adverb
- in a way that violates religious or moral principles
- to an extreme or excessive degree
Usage: informal
Examples
- He had been living sinfully for years before finding religion.
- The chocolate cake was sinfully rich and delicious.
- She felt she had acted sinfully by lying to her parents.
- The hotel room was sinfully expensive but worth every penny.
- They were sinfully wasteful with their money.
- The dessert was sinfully decadent with layers of cream and chocolate.