scruple
/ˈskrʌbəl, ˈskrʊbəl/Definitions
1. noun
a feeling of doubt or anxiety about the morality of an action; a small amount or degree of something.
“She had a scruple about taking the last seat on the bus, but no one else wanted it.”
2. verb
to feel or express doubt or anxiety about the morality of an action.
“He scrupled at the thought of lying to his boss, but felt pressured to do so.”