Macmillan Dictionary

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Pronunciation of 

portentous

view main entry for portentousadjective formal  /pɔrˈtentəs/
American English pronunciation: portentousClick to listen to the pronunciation of portentous

derived words

portentously

adverb

portentousness

noun [uncountable]
portentousness noun [uncountable]Words used to describe warnings and advice: advisory, cautionary, consultative, consulting, deterrent, expert, portentous, warning, forewarned is forearmedWriting or speech style: delivery, diction, flow, fluency, formality, formulation, fustian, gymnastics, idiolect, monotone

This is the American English pronunciation of portentous. View British English pronunciation of portentous.

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