Part of Speech adjective
Origin + Etymology
mid-17th century; Latin; first recorded in the 1680s, from "power of producing belief, quality of being highly probable or convincing"
Synonyms
  • compelling convincing forceful persuasive telling weighty
Antonyms
  • ineffective unimportant impotent invalid weak
Definition
convincing or believable by virtue of forcible, clear, or incisive presentation; telling
Example
A) He received an A in his debate class thanks to his cogent argument and presentation. B) She knew he was lying when he couldn't give her a cogent answer as to his whereabouts that day.
Usage Over Time

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