UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌplætɪˈtjuːdɪnəs/

US:USA pronunciation: respellingUSA pronunciation: respelling(plat′i to̅o̅dn əs, -tyo̅o̅d-)

WordReference Random House Unabridged Dictionary of American English © 2020
plat•i•tu•di•nous  (plat′i to̅o̅dn əs, -tyo̅o̅d-),USA pronunciation adj. 
  1. characterized by or given to platitudes.
  2. of the nature of or resembling a platitude.
plat′i•tudi•nous•ly, adv. 
plat′i•tudi•nous•ness, n. 
  • platitude + -inous (see platitudinal, -ous) 1855–60

'platitudinous' also found in these entries (note: many are not synonyms or translations):
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