scruple
Cross references: 1. measure 2. qualm 1. scru.ple \'skru:-p*l\ n [ME scriple, fr. L scrupulus a unit of weight, fr. scrupulus]small sharp stone 2: a minute part or quantity : IOTA 2. scruple n [MF scrupule, fr. L scrupulus small sharp stone, cause of mental di]scomfort, scruple, dim. of scrupus sharp stone - more at SHRED 1: an ethical consideration or principle that inhibits action 2: SCRUPULOUSNESS 3. scruple \-p(*-)lin\ vi or scru.pling 1: to have scruples 2: to be reluctant on grounds of conscience : HESITATE
Webster's English Dictionary