- immorality (n.)
- 1560s, from assimilated form of in- (1) "not, opposite of" + morality.
- imprecision (n.)
- "inexactness," 1771, from assimilated form of in- (1) "not, opposite of" + precision.
- inactive (adj.)
- 1640s, from in- (1) "not, opposite of" + active. Perhaps a back-formation from Inactivity.
- inapplicable (adj.)
- 1650s, from in- (1) "not, opposite of" + applicable. Related: Inapplicably; inapplicability.
- inaptitude (n.)
- 1610s, from in- (1) "not, opposite of" + aptitude. The Frenchified version is ineptitude.
- inattentive (adj.)
- 1650s, from in- (1) "not, opposite of" + attentive. Related: Inattentively; inattentiveness.
- inauthentic (adj.)
- 1783, from in- (1) "not, opposite of" + authentic. Related: Inauthentically.
- indiscernible (adj.)
- 1630s, from in- (1) "not, opposite of" + discernible. Related: Indiscernibly; indiscernibility.
- inexpensive (adj.)
- 1670s, from in- (1) "not, opposite of" + expensive. Related: Inexpensively.
- inferential (adj.)
- 1650s, from Medieval Latin inferentia (see inference) + -al (1). Related: Inferentially.
- ineffective (adj.)
- 1650s, from in- (1) "not, opposite of" + effective. Related: Ineffectively; ineffectiveness (1744).
- instinctual (adj.)
- 1841, from instinct (Latin instinctus) + -al (1). Related: Instinctually.
- institutional (adj.)
- 1610s, "of or pertaining to an institution," from institution + -al (1). Related: Institutionally.
- thunderclap (n.)
- also thunder-clap, late 14c., from thunder (n.) + clap (n.1).
- chamber-pot (n.)
- also chamberpot, 1560s, from chamber (n.) + pot (n.1).
- junky (adj.)
- "run-down, seedy, trashy," 1876, from junk (n.1) + -y (2).
- ragtop (n.)
- "convertible car," 1954, from rag (n.) + top (n.1).
- ditheism (n.)
- "belief in the existence of two gods," 1670s, from di- (1) + theism.
- shivery (adj.)
- "characterized by shaking," 1747, from shiver (v.1) + -y (2).
- shogunate (n.)
- 1871, a hybrid, from Japanese shogun + Latinate suffix -ate (1).
- shul (n.)
- "synagogue," 1874, from Yiddish shul, from German Schule (see school (n.1)).
- smokestack (n.)
- also smoke-stack, 1833, from smoke (n.1) + stack (n.).
- schoolgirl (n.)
- 1777, from school (n.1) + girl. As an adjective from 1922.
- secretarial (adj.)
- 1801, from stem of secretary (Medieval Latin secretarius) + -al (1).
- sequential (adj.)
- 1816, from Late Latin sequentia (see sequence) + -al (1). Related: Sequentially.
- shantytown (n.)
- also shanty town, 1836, from shanty (n.1) + town.
- engraft (v.)
- 1580s, from en- (1) + graft (n.). Originally figurative. Related: Engrafted; engrafting.
- slacken (v.)
- early 15c., from slack (adj.) + -en (1). Related: Slackened; slackening.
- sororal (adj.)
- 1650s, from Latin soror "sister" (see sister) + -al (1).
- pitch-pipe (n.)
- 1711, from pitch (n.) in the musical sense + pipe (n.1).
- salvia (n.)
- 1844, from Latin salvia "the plant sage" (see sage (n.1)).
- sawfish (n.)
- also saw-fish, 1660s; see saw (n.1.) + fish (n.).
- impermanent (adj.)
- 1650s, from assimilated form of in- "not, opposite of" (see in- (1)) + permanent.
- impermissible (adj.)
- 1814, from assimilated form of in- "not, opposite of" (see in- (1)) + permissible.
- improvision (n.)
- "want of forethought," 1640s, from assimilated form of in- (1) "not, opposite of" + provision.
- incognizant (adj.)
- also incognisant, 1826, from in- (1) "not, opposite of" + cognizant. Related: Incognizance.
- incomprehensive (adj.)
- 1650s, from in- (1) "not, opposite of" + comprehensive. Related: Incomprehensively.
- incontrovertible (adj.)
- 1640s, from in- (1) "not" + controvertible (see controvert). Related: Incontrovertibly; incontrovertibility.
- pleural (adj.)
- 1835, from pleura + -al (1). Alternative pleuric is attested from 1825.
- paraprofessional (adj.)
- 1962, from para- (1) + professional (adj.). As a noun from 1968.
- parenteral (adj.)
- 1905, from para- (1) + Greek enteron "intestine" (see enteric).
- petrology (n.)
- 1811 (erroneously as petralogy), from petro- (1) "rock" + -ology.
- cockchafer (n.)
- from cock (n.1), in reference to its size, + chafer.
- play-bill (n.)
- also playbill, 1670s, from play (n.) + bill (n.1).
- pawnshop (n.)
- also pawn-shop, by 1763, from pawn (n.1) + shop (n.).
- crusader (n.)
- 1743, from crusade + -er (1). Earlier was croisader, from French croisadeur.
- paycheck (n.)
- also pay-check, 1894, from pay (n.) + check (n.1).
- reddish (adj.)
- late 14c., from red (adj.1) + -ish. Related: Reddishness.
- representational (adj.)
- 1855, from representation + -al (1). Specifically of visual arts from 1923. Related: Representationally.
- punky (adj.)
- 1872, of wood, from punk (n.1) + -y (2). Related: Punkiness.
