-ative

-ative

suff.
Of, relating to, or associated with: talkative.

[Middle English, from Old French -atif, -ative, from Latin -ātīvus, from -ātus, past participle suff.; see -ate1.]

-ative

suffix forming adjectives
of, relating to, or tending to: authoritative; decorative; informative.
[from Latin -ātīvus, from ātus -ate1 + īvus -ive]

-ative

a suffix used to form adjectives from verbs ending in -ate1 (regulative); on this model, used to form adjectives from other stems (normative).
[< Latin -ātīvus=-āt(us) -ate1 + -īvus -ive]