Online Etymology Dictionary

transducer (n.): 1924, "device which converts energy from one form to another," from Latin transducere/traducere "lead across, transfer, carry over," from trans- "across" (see trans-) + ducere "to lead" (see duke (n.)).
transduction (n.): "act of leading or carrying over," 1650s, from Latin transductionem/traducionem (nominative transductio) "a removal, transfer," noun of action from transducere/traducere (see traduce).
transect (v.): "to cut across," 1630s, from Latin trans- "across" (see trans-) + sectus, past participle of secare "to cut" (see section (n.)). Related: Transected; transecting.
transept (n.): "transverse section of a cruciform church," 1530s, from Medieval Latin transeptum, from Latin trans- "across" (see trans-) + saeptum "fence, partition, enclosure" (see septum). Rare before 1700. Related: Transeptal.
transeunt (adj.): variant of transient (adj.), usually in a sense of "operating beyond or outside itself" (opposite of immanent).
transexual: see transsexual.
transfer (v.): late 14c., from Old French transferer or directly from Latin transferre "bear across, carry over, bring through; transfer, copy, translate," from trans- "across" (see trans-) + ferre "to carry" (see infer). Related: Transferred; transferring.
transfer (n.): 1670s, "conveyance of property," from transfer (v.).
transferable (adj.): 1650s, from transfer (v.) + -able.
transferee (n.): 1736, "one to whom a transfer is made;" 1890s as "one who is transferred;" from transfer (v.) + -ee.
transference (n.): "act of transferring," 1680s, from transfer (v.) + -ence. In psychoanalytical sense it is recorded from 1911, translating German übertragung (Freud).
transferor (n.): 1875, legalese form of transferer (1807); agent noun in Latin form from transfer (v.).
transfiguration (n.): late 14c., from Latin transfigurationem (nominative transfiguratio) "a change of form," noun of action from past participle stem of transfigurare (see transfigure). In English, originally "the change in appearance of Christ before his disciples" (Matt. xvii:2; Mark ix:2,3). The non-Christian sense is first recorded 1540s.
transfigure (v.): early 13c., from Old French transfigurer "change, transform" (12c.), and directly from Latin transfigurare "change the shape of," from trans- "across" (see trans-) + figurare "to form, fashion," from figura "to form, shape," from figura "a shape, form, figure" (see figure (n.)). Related: Transfigured; transfiguring.
transfix (v.): 1580s, "pierce through, impale," from Middle French transfixer (15c.), from Latin transfixus "impaled," past participle of transfigere "to impale, pierce through," from trans- "through" (see trans-) + figere "to fix, fasten" (see fix (v.)). Figurative sense of "make motionless or helpless, as with amazement, terror, or grief" is first recorded 1640s. Related: Transfixed; transfixing.
transfixion (n.): c. 1600, noun of action from transfix.
transform (v.): mid-14c., "change the form of" (transitive), from Old French transformer (14c.), from Latin transformare "change in shape, metamorphose," from trans- "across" (see trans-) + formare "to form" (see form (v.)). Intransitive sense "undergo a change of form" is from 1590s. Related: Transformed; transforming.
transformation (n.): c. 1400, from Old French transformation and directly from Church Latin transformationem (nominative transformatio) "change of shape," noun of action from past participle stem of transformare (see transform).
transformational (adj.): 1857, from transformation + -al (1).
transformative (adj.): 1660s, from Latin transformatus, past participle of transformare (see transform) + -ive.
transformer (n.): c. 1600, "one who or that which transforms," agent noun from transform (v.). Meaning "device to reduce electrical currents" is from 1882.
transfuse (v.): "to transfer by pouring," early 15c., from Latin transfusus, past participle of transfundere "pour from one container to another," from trans- "across" (see trans-) + fundere "to pour" (see found (v.2)). Related: Transfused; transfusing.
transfusion (n.): 1570s, "action of pouring liquid from one vessel to another," from Middle French transfusion and directly from Latin transfusionem (nominative transfusio) "a decanting, intermingling," noun of action from past participle stem of transfundere "pour from one container to another" (see transfuse). Sense of "transfering of blood from one individual to another" first recorded 1640s.
transgender (adj.): by 1988, from trans- + gender (n.). Related: Transgendered.
transgress (v.): late 15c., from Middle French transgresser (14c.), from Latin transgressus, past participle of transgredi "to step across, step over" (see transgression). Related: Transgressed; transgressing.
transgression (n.): late 14c., from Old French transgression "transgression," particularly that relating to Adam and the Fall (12c.), from Late Latin transgressionem (nominative transgressio) "a transgression of the law," in classical Latin, "a going over, a going across," noun of action from transgressus, past participle of transgredi "step across, step over; climb over, pass, go beyond," from trans- "across" (see trans-) + gradi (past participle gressus) "to walk, go" (see grade (n.)). Geological sense is from 1882.
transgressive (adj.): 1640s, "inclined to transgress," from transgress + -ive. Related: Transgressively.
transgressor (n.): early 15c., from Anglo-French transgressour, Old French transgressor (14c.), and directly from Latin transgressor, agent noun from transgredi (see transgression).
transience (n.): 1745, from transient + -ence. Related: Transiency (1650s).
transient (adj.): c. 1600, "transitory, not durable," from Latin transientem (nominative transiens) "passing over or away," present participle of transire "cross over, go over, pass over, hasten over, pass away," from trans- "across" (see trans-) + ire "to go" (see ion). Meaning "passing through a place without staying" is from 1680s. The noun is first attested 1650s; specific sense of "transient guest or boarder" attested from 1857. Related: Transiently.
transistor (n.): small electronic device, 1948, from transfer + resistor, so called because it transfers an electrical current across a resistor. Said to have been coined by U.S. electrical engineer John Robinson Pierce (1910-2002) of Bell Telephone Laboratories, Murray Hill, N.J., where the device was invented in 1947. It took over many functions of the vacuum tube. Transistor radio is first recorded 1958.
transistorize (v.): 1953, from transistor + -ize. Related: Transistorized.
transit (n.): mid-15c., "act or fact of passing across or through," from Latin transitus "a going over, passing over, passage," verbal noun from past participle of transire "go or cross over" (see transient). Meaning "a transit of a planet across the sun" is from 1660s. Meaning "public transportation" is attested from 1873.
transit (v.): mid-15c., from Latin transitus, past participle of transire "go or cross over" (see transient). Astronomical sense is from 1680s. Related: Transited; transiting.
transition (n.): mid-15c., from Latin transitionem (nominative transitio) "a going across or over," noun of action from past participle stem of transire "go or cross over" (see transient).
transitional (adj.): 1810, from transition + -al (1). Related: Transitionally.
transitive (adj.): "taking a direct object" (of verbs), 1570s (implied in transitively), from Late Latin transitivus (Priscian) "transitive," literally "passing over (to another person)," from transire "go or cross over" (see transient). Related: Transitively.
transitory (adj.): "passing without continuing," late 14c., from Old French transitoire "ephemeral, transitory" (12c.), from Late Latin transitorius "passing, transient," in classical Latin "allowing passage through," from transitus, past participle of transire "go or cross over" (see transient).
translate (v.): early 14c., "to remove from one place to another," also "to turn from one language to another," from Old French translater and directly from Latin translatus "carried over," serving as past participle of transferre "to bring over, carry over" (see transfer), from trans- (see trans-) + latus "borne, carried" (see oblate (n.)). Related: Translated; translating. A similar notion is behind the Old English word it replaced, awendan, from wendan "to turn, direct" (see wend).
translater (n.): occasional spelling of translator.
translation (n.): mid-14c., "removal of a saint's body or relics to a new place," also "rendering of a text from one language to another," from Old French translacion "translation" of text, also of the bones of a saint, etc. (12c.) or directly from Latin translationem (nominative translatio) "a carrying across, removal, transporting; transfer of meaning," noun of action from past participle stem of transferre (see transfer (v.)).
translator (n.): mid-14c., from Old French translator (12c.) or directly from Latin translator "one who transfers or interprets, one who carries over," agent noun from transferre (see transfer (v.)).
transliterate (v.): "to write a word in the characters of another alphabet," 1849, from trans- "across" (see trans-) + Latin littera (also litera) "letter, character" (see letter (n.)). Related: Transliterated; transliterating.
transliteration (n.): "rendering of the letters of one alphabet by the equivalents of another," 1835, from trans- "across" (see trans-) + Latin littera (also litera) "letter, character" (see letter (n.)).
translocation (n.): "removal from one place to another," 1620s, from trans- + location.
translucence (n.): early 15c., from Medieval Latin translucentia, from Latin translucentem (see translucenct). Related: Translucency.
translucent (adj.): 1590s, from Latin translucentem (nominative translucens), present participle of translucere "to shine through," from trans- "through" (see trans-) + lucere "to shine" (see light (n.)). Related: Translucently.
transmigration (n.): c. 1300, from Old French transmigracion "exile, diaspora" (13c.) and directly from Late Latin transmigrationem (nominative transmigratio) "change of country," noun of action from past participle stem of Latin transmigrare "to wander, move, to migrate," from trans- "over" (see trans-) + migrare "to migrate" (see migration). Originally literal, in reference to the removal of the Jews into the Babylonian captivity; general sense of "passage from one place to another" is attested from late 14c.; sense of "passage of the soul after death into another body" first recorded 1590s.
transmissible (adj.): 1640s, from Latin transmiss-, stem of transmittere "send across, carry over" (see transmit) + -ible. Related: Transmissibility.
transmission (n.): 1610s, "conveyance from one place to another," from Latin transmissionem (nominative transmissio) "a sending over or across, passage," noun of action from past participle stem of transmittere "send over or across" (see transmit). Meaning "part of a motor vehicle that regulates power from the engine to the axle" is first recorded 1894.