ˈsinfəl adjective
Etymology: Middle English, from Old English synfull, from syn sin + -full -ful — more at sin
1. : tainted with or full of sin : wicked , iniquitous
sinful men
2. : marked by or involving sin
sinful thoughts
sinful practices
3. : highly culpable
a sinful waste in a world that lacks a sufficiency of food — Lionel Trilling