sinful

Etymology

From Middle English synful, senful, sunful, from Old English synful (“sinful, guilty, wicked, corrupt”), equivalent to sin + -ful. Compare Dutch zondevol (“sinful”), German sündevoll (“sinful”), Danish syndefuld (“sinful”), Swedish syndfull (“sinful”), Icelandic syndfullur (“sinful”).

adj

1. Having sinned; guilty of sin.
2. Constituting a sin; morally or religiously wrong; wicked; evil
3. (colloquial) decadent (luxuriously self-indulgent)
   I take a whiff of the most sincerely sinful cookies in the history of the world. It’s a recipe I saw in People magazine once at the dentist's office, and Dr. Segal would not approve of its ingredients (or maybe she would, in the interest of keeping her business afloat). April 10, 2018, Rachel Cohn, David Levithan, Sam & Ilsa's Last Hurrah, New York City: Random House