Of, relating to, or associated with: talkative.
[Middle English, from Old French -atif, -ative, from Latin -ātīvus, from -ātus, past participle suff.; see -ate1.]
suffix forming adjectives
of, relating to, or tending to: authoritative; decorative; informative.
[from Latin -ātīvus, from ātus -ate1 + īvus -ive]
a suffix used to form adjectives from verbs ending in -ate1 (regulative); on this model, used to form adjectives from other stems (normative).