1
- （一般作scruples）a feeling of doubt or hesitation with regard to the morality or propriety of a course of action顾虑; （感到）良心不安; 犹豫：
I had no scruples about eavesdropping
我对偷听没有丝毫顾忌。
mass noun without scruple, politicians use fear as a persuasion weapon.政客们毫无顾忌地利用恐惧作为劝说的武器。
2
- historical a unit of weight equal to 20 grains used by apothecaries〈史〉药剂师所用药剂重量单位（等于20格令）。
2.1
- archaic a very small amount of something, especially a quality〈古〉（尤指品质）微量。
no obj., with infinitive［usu. with negative］
- hesitate or be reluctant to do something that one thinks may be wrong顾忌; 犹豫：
she doesn't scruple to ask her parents for money.
她毫不顾忌向她父母要钱。
词源
late Middle English:from French scrupule or Latin scrupulus, from scrupus, literally 'rough pebble'， (figuratively) 'anxiety'.