Etymology
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Words related to -ive

inchoative (adj.)

1630s, "indicating beginning or inception;" see inchoate + -ive. Especially in grammar, of verbs, "denoting the beginning of action, inceptive," 1660s.

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incitive (adj.)

"inciting, instigating," 1725; see incite + -ive. Other adjectives that have been used are incitative (c. 1500), incitatory (c. 1600), incitory (1941).

inducive (adj.)

"tending to induce," 1610s, from induce + -ive.

injunctive 

1620s, from Latin iniunct-, past participle stem of iniungere "impose; attach to" (see injunction) + -ive. As a term in grammar, from 1910.

innovative (adj.)

"tending to bring in something new; introducing or tending to introduce innovations; characterized by innovations," 1796 (with an isolated use from c. 1600); see innovate + -ive. Related: Innovatively; innovativeness.

instinctive (adj.)

1640s, from Latin instinct-, past participle stem of instinguere "to incite, impel" (see instinct) + -ive. Related: Instinctively (1610s); instinctiveness. Coleridge uses instinctivity.

instructive (adj.)

"serving to instruct or inform," 1610s, from instruct (v.) + -ive. An earlier adjective was instructing (1580s). Related: Instructively; instructiveness.

interpretive (adj.)

1670s, from interpret + -ive, perhaps on model of assertive or other like words, where the -t- belongs to the Latin stem. The preferred formation is interpretative. Listed by Fowler among the words "that for one reason or another should not have been brought into existence."

introspective (adj.)

"having the quality of looking within," 1820 (Southey), from Latin introspect-, past participle stem of introspicere "look into, look at" (see introspection) + -ive. Related: Introspectively; introspectiveness.

intrusive (adj.)

c. 1400, "usurping," from Latin intrus-, past participle stem of intrudere (see intrusion) + -ive. Meaning "coming unbidden" is from 1640s. Geological sense "thrust in out of regular place" is from 1826. Related: Intrusively; intrusiveness.

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