IPA: //plɛ.nɪˈtjuː.dɪ.nəs//
KK: /plɛnɪˈtudɪnəs/
Having a lot of something; abundant or full.
The garden was plenitudinous with flowers in full bloom.
Plenitudinous → It is formed from "plenus" (meaning full) and the suffix "-dous" (meaning having the quality of). The word "plenitudinous" means having the quality of being full or abundant.
Think of 'full' ('plenus') and remember that 'plenitudinous' describes something that is abundant or overflowing.