A bad habit or custom; a vice.

A fault, vice, sin; blame; (also) a physical blemish, a defect.

A habit or practice of an immoral, degrading, or wicked nature.

A bad habit.

A defect, imperfection, blameable quality or feature. in moral character. (Expressing a milder censure than vice.)

A bad habit. Used esp. of animals.

The quality or condition of being depraved or corrupt. A depraved act or practice.

An instance of this; a vice. Obsolete.

A depraved habit of mind or feeling.

A bad habit.

An instance of this.

(un-, prefix1 affix 6.)