qualm
//kwɑːm//
Noun
qualmSingular
qualmsPlural
1
An uneasy feeling of doubt, worry, or fear, especially about one's own conduct or the correctness of an action.
She had no qualms about telling him the truth.
2
A sudden feeling of faintness or nausea.
She felt a qualm of nausea as the boat rocked on the waves.