Online Etymology Dictionary

dispose (v.): late 14c., from Old French disposer (13c.) "arrange, order, control, regulate" (influenced in form by poser "to place"), from Latin disponere "put in order, arrange, distribute," from dis- "apart" (see dis-) + ponere "to put, place" (past participle positus; see position (n.)). Related: Disposed; disposing.
disposed (adj.): mid-14c., "inclined, in the mood," past participle adjective from dispose. Meaning "in a certain condition" is late 14c.; "arranged" is 15c.
disposition (n.): late 14c., "ordering, management," also "tendency of mind," from Old French disposicion (12c.) "arrangement, order; mood, state of mind," from Latin dispositionem (nominative dispositio) "arrangement, management," noun of action from past participle stem of disponere "to put in order, arrange" (see dispose). References to "temperament" (late 14c. in English) are from astrological use of the word for "position of a planet as a determining influence."
dispossess (v.): late 15c., from Old French despossesser "to dispossess," from des- (see dis-) + possesser (see possess). Related: Dispossessed; dispossessing.
dispossession (n.): 1570s, noun of action from dispossess.
disproof (n.): 1530s; see dis- + proof.
disproportion (n.): 1550s; see dis- + proportion.
disproportionate (adj.): 1550s, from dis- "not" + proportionate. Improportionate in same sense is from late 14c. Related: Disproportionately.
disprove (v.): late 14c., from Old French desprover "refute, contradict," from des- (see dis-) + prover (see prove). Related: Disproved; disproving.
disputant (n.): 1610s, from Latin disputantem (nominative disputans), present participle of disputare (see dispute).
disputation (n.): late 14c., from Old French desputasion and directly from Latin disputationem (nominative disputatio), noun of action from past participle stem of disputare (see dispute).
dispute (v.): c. 1300, from Old French desputer (12c.) "dispute, fight over, contend for, discuss," from Latin disputare "weigh, examine, discuss, argue, explain," from dis- "separately" (see dis-) + putare "to count, consider," originally "to prune" (see pave).

Used in Vulgate in sense of "to argue, contend with words." Related: Disputable; disputed; disputing. The noun is not certainly recorded before 1590s (disputacioun in that sense is from late 14c.).
disqualification (n.): 1710s, agent noun from disqualify.
disqualify (v.): 1718 (implied in disqualified), from dis- + qualify. Related: Disqualifying.
disquiet (v.): 1520s, from dis- + quiet. Related: Disquieted; disquieting. As a noun, from 1570s.
disquietude (n.): 1709; from disquiet on model of quietude.
disquisition (n.): c. 1600, "subject for investigation," also "systematic search," from Latin disquisitionem (nominative disquisitio) "an inquiry, investigation," noun of action from past participle stem of disquirere "inquire," from dis- "apart" (see dis-) + quaerere "seek, ask" (see query (v.)). Sense of "long speech" first recorded 1640s.
disregard (v.): 1640s, from dis- + regard. Related: Disregarded; disregarding. As a noun, from 1660s.
disremember (v.): 1815, American English colloquialism, from dis- + remember.
disrepair (n.): 1798, from dis- + repair (n.).
disreputable (adj.): 1680s; see dis- + reputable. Related: Disreputably; disreputableness.
disrepute (n.): 1650s, from dis- + repute (n.).
disrespect: 1610s (v.), 1630s (n.), from dis- + respect. Related: Disrespected; disrespecting.
disrespectful (adj.): 1670s; see dis- + respectful. Related: Disrespectfully.
disrobe (v.): 1580s in intransitive sense of "to undress" (oneself); see dis- + robe. Related: Disrobed; disrobing. Transitive sense is from 1580s.
disrupt (v.): 1650s, but rare before c. 1820, from Latin disruptus, past participle of disrumpere (see disruption). Or perhaps a back-formation from disruption. Related: Disrupted; disrupting.
disruption (n.): early 15c., from Latin disruptionem (nominative disruptio) "a breaking asunder," noun of action from past participle stem of disrumpere "break apart, split, shatter, break to pieces," from dis- "apart" (see dis-) + rumpere "to break" (see rupture (n.)).
disruptive (adj.): 1862 (in electricity sense from 1842); see disrupt + -ive. Related: Disruptively; disruptiveness.
dissatisfaction (n.): 1630s; see dis- + satisfaction.
dissatisfy (v.): 1660s; see dis- + satisfy. Related: Dissatisfied; dissatisfying.
dissect (v.): c. 1600, from Latin dissectus, past participle of dissecare "to cut to pieces" (see dissection). Or perhaps a back-formation from dissection. Related: Dissected; dissecting.
dissection (n.): 1580s, from Middle French dissection, from Medieval Latin dissectionem (nominative dissectio), noun of action from past participle stem of Latin dissecare "cut in pieces," from dis- "apart" (see dis-) + secare "to cut" (see section (n.)).
dissemble (v.): early 15c. (implied in dissemblable), apparently a variant of Middle English dissimule (influenced by Middle French dessembler or English resemble), late 14c., from Old French dissimuler, from Latin dissimulare (see dissimulation). Related: Dissembled; dissembling.
dissembler (n.): 1520s, agent noun from dissemble.
disseminate (v.): c. 1600, from Latin disseminatus, past participle of disseminare "to spread abroad, disseminate," from dis- "in every direction" (see dis-) + seminare "to plant, propagate," from semen (genitive seminis) "seed" (see semen). Related: Disseminated; disseminates; disseminating. Middle English had dissemen "to scatter" (early 15c.).
dissemination (n.): 1640s, from Latin disseminationem (nominative disseminatio) "a scattering of seed, a sowing," noun of action from past participle stem of disseminare (see disseminate). Or perhaps a native noun formation from disseminate.
dissension (n.): early 14c., from Old French dissension (12c.) and directly from Latin dissensionem (nominative dissensio) "disagreement, difference of opinion, discord, strife," noun of action from past participle stem of dissentire "disagree" (see dissent).
dissent (v.): early 15c., from Latin dissentire "differ in sentiments, disagree, be at odds, contradict, quarrel," from dis- "differently" (see dis-) + sentire "to feel, think" (see sense (n.)). Related: Dissented; dissenting. The noun is 1580s, from the verb.
Has there ever been a society which has died of dissent? Several have died of conformity in our lifetime. [Jacob Bronowski "Science and Human Values," 1956]
dissenter (n.): 1630s, in 17c. especially of religions (with a capital D- from 1670s); agent noun from dissent.
dissertation (n.): 1610s, "discussion, debate," from Latin dissertationem (nominative dissertatio) "discourse," noun of action from past participle stem of dissertare "debate, argue, examine, harangue," frequentative of disserere "discuss, examine," from dis- "apart" (see dis-) + serere "to arrange (words)" (see series). Sense of "formal, written treatise" is 1650s.
disservice (n.): 1590s; see dis- + service. Perhaps formed on analogy of French desservice (16c.).
dissever (v.): late 13c., from Anglo-French deseverer, Old French dessevrer (10c.), from des- (see dis-) + sevrer (see sever). Related: Dissevered; dissevering; disseverance; disseveration.
dissidence (n.): 1650s, from Latin dissidentia "diversity, contrariety," from dissidens, present participle of dissidere (see dissident).
dissident (adj.): 1530s, from Latin dissidentem (nominative dissidens), present participle of dissidere "to be remote; disagree, be removed from," literally "to sit apart," from dis- "apart" (see dis-) + sedere "to sit" (see sedentary).
dissident (n.): 1766, in reference to Protestants, from dissident (adj.). In the political sense first used 1940, coinciding with the rise of 20c. totalitarian systems, especially with reference to the Soviet Union.
dissimilar (adj.): 1620s, from dis- + similar; perhaps on analogy of French dissimilaire. Related: Dissimilarity.
dissimilate (v.): "make different," 1821, from dis- + Latin similis on model of assimilate. Related: Dissimilated; dissimilating; dissimilation (1806).
dissimilation (n.): 1874, noun of action from dissimilate.
dissimilitude (n.): early 15c., from Latin dissimilitudo, from dissimilis, from dis- "not" (see dis-) + similis "like" (see similar).
dissimulate (v.): 1530s, from Latin dissimulatus, past participle of dissimulare "to disguise, hide, conceal, keep secret," from dis- (see dis-) + simulare (see simulate). Related: Dissimulated; dissimulating.