IPA: //plætɪˈtjuːdɪnəl//
KK: /plætɪˈtjuːdɪnəl/
Describing something that is dull or unoriginal, often because it is overly simple or repetitive.
His speech was filled with platitudinal remarks that failed to inspire the audience.
Platitudinal → It is formed from "platitude" (from French *platitude*, meaning flatness or dullness) and the suffix "-al" (meaning pertaining to). The word "platitudinal" refers to something that is related to or characterized by flatness or dullness, often in a figurative sense regarding ideas or statements.
Think of 'flatness' ('platitude') to remember that 'platitudinal' describes something that is dull or lacking in originality.