-ive

Collins Concise English Dictionary © HarperCollins Publishers::

-ive suffix

1. (forming adjectives) indicating a tendency, inclination, character, or quality: divisive, prohibitive, festive, massive
2. (forming nouns of adjectival origin): detective, expletive

Etymology: from Latin -īvus

WordReference Random House Learner's Dictionary of American English © 2025

I've /aɪv/  contraction. 

1. Pronouns a shortened form of I have:
   I've been working on the railroad for a long time.

-ive, suffix. 

1. -ive is attached to roots or nouns to form adjectives with the meaning "having a tendency or connection with;
   like'':
   act(ion) + -ive → active (= tending to be full of action or activity);
   sport + -ive → sportive (= like sports).

WordReference Random House Unabridged Dictionary of American English © 2025

I've  (īv), 

1. Pronouns contraction of
   I have.

Usage

See contraction. 

-ive, 

1. a suffix of adjectives (and nouns of adjectival origin) expressing tendency, disposition, function, connection, etc.:
   active;
   destructive;
   detective;
   passive;
   sportive.
   Cf. -ative, -itive.

• Latin -īvus; in some words, representing French -ive, feminine of -if