English
truthly
From truth + -ly.
Formed from truth + -ly
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
adv In accordance with truth; honestly, without deceit; truthfully.
Sources
Sources: Wiktionary, “truthly”. 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 / truthly