English
truthism
From truth + -ism.
Formed from truth + -ism
Proto-Germanic *triwwiþō ‘truth, promise’
Proto-West Germanic *triuwiþu
Old English trēowþ ‘truth, good faith’
Middle English treuthe ‘loyalty, truth’
English truth
Today it means
noun A belief in the importance of truth and objective facts.
Sources
Sources: Wiktionary, “truthism”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / truthism