From truth + -some.
truthsome (comparative more truthsome, superlative most truthsome)
- (rare) truthful; telling the truth
1922, Harry Franklin Harrington, Writing for Print, pages 119:
- You lose regard for the truthsome fact / And 'scape the provisions of the Volstead Act.
- 2002, "Heart of Gold", Firefly episode,
- Inara, I ain't looking for anything from you. I'm just feeling kind of truthsome right now.