■ noun
1》 a feeling of doubt or hesitation with regard to the morality or propriety of an action.
2》 historical a unit of weight equal to 20 grains used by apothecaries.
↘ archaic a very small amount.
■ verb hesitate or be reluctant to do something that one thinks may be wrong.
Origin
ME: from Fr. scrupule or L. scrupulus , from scrupus , lit. 'rough pebble', (figuratively) 'anxiety'.