sinfullest

Adjective

sinful (comparative more sinful or sinfuller, superlative most sinful or sinfullest)

1. Having sinned; guilty of sin.

   Synonyms:

   sinny, peccant

   Antonyms:

   sinless, unsullied

2. Constituting a sin; morally or religiously wrong; wicked; evil.

   Synonyms:

   diabolical, unholy, abandoned, arrant, bad, bad apple, bad seed, baleful, scurrilous, baneful

   Antonyms:

   righteous, sinless

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).2018 April 10, Rachel Cohn, David Levithan, Sam & Ilsa's Last Hurrah, New York City: Random House, →ISBN

   Synonyms:

   epicurean, sybaritic, Babylonian, decadent, epicureal, epicureous, epicurish, hedonic, hedonistic, intemperate