platitude - definition and synonyms

noun [countable] 

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/ˈplætɪtjuːd/
singularplatitude
pluralplatitudes
  1. something that has been said so often that it is no longer interesting and shows a lack of imagination

derived word

platitudinous

 

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/ˌplætɪˈtjuːdɪnəs/
adjective