qualm

An uneasy feeling about the propriety or rightness of a course of action.

A sudden disturbing feeling.

A sudden feeling of sickness, faintness, or nausea.

Illness; disease; pestilence; plague.

A sudden attack of illness; a turn of faintness or suffering; a throe or throb of pain.

Especially, a sudden fit or seizure of sickness at the stomach; a sensation of nausea.

A scruple or twinge of conscience; compunction; uneasiness.

The boding cry of a raven.

To be sick; suffer from qualms.

To cause pain or qualms.