IPA: /ˈplɛntɪfəl/
KK: /ˈplɛntɪfəl/
Existing in large amounts or in great supply.
The garden produced a plentiful amount of vegetables this year.
Comparative: more plentiful
Superlative: most plentiful
Plentiful → It is formed from "plenty" (from Old French *plenté*, meaning abundance) and "-ful" (meaning full of). The word "plentiful" means full of plenty or having an abundance of something.
Think of 'plenty' as a sign of abundance, and remember that 'plentiful' means full of that abundance.