IPA: /ˈplɛntɪəs/
KK: /ˈplɛntɪəs/
Existing in large amounts; very plentiful.
The garden was filled with plenteous flowers in every color.
Plenteous → It is formed from "plentus" (from Latin *plenus*, meaning full) and the suffix "-eous" (meaning characterized by). The word "plenteous" means characterized by fullness or abundance.
Think of 'fullness' ('plenus') to remember that 'plenteous' means having a lot or being abundant.