truism
UK: ˈtruː.ɪ.zəm | US: ˈtruː.ɪ.zəm
n. a statement that is obviously true but often overused or lacking in originality
n. a self-evident or hackneyed truth
The word "truism" emerged in the early 18th century, combining the adjective "true" (from Old English trēowe, meaning "faithful" or "consistent with fact") with the suffix "-ism" (from Greek -ismos, used to form nouns indicating a principle or ideology). The term originally described statements so obviously true that they required no proof, but over time, it acquired a slightly pejorative connotation, implying banality or lack of depth.
Saying "water is wet" is a classic truism.
His speech was full of empty truisms that offered no real insight.
The politician relied on truisms to avoid addressing complex issues.
While technically correct, her argument amounted to little more than a truism.
The book’s advice was dismissed as a collection of tired truisms.