Definitions for i'veaɪv
Random House Webster's College Dictionary
Category: Function Word, Usage Note
a suffix of adjectives (and nouns of adjectival origin) expressing tendency, disposition, function, connection, etc.:
active; corrective; detective; sportive.
Origin of -ive:
< L -īvus; in some words, repr. F -ive, fem. of -if
Kernerman English Learner's Dictionary
I've never seen him before.
colloquial contraction of I have