1. (n.) Hesitation as to action based on conscience or moral principle\.

2. (n.) A weight of twenty grains; the third part of a dram.

3. (n.) Hence, a very small quantity; a particle.

4. (v. i.) To be reluctant or to hesitate, as regards an action, on account of considerations of conscience or expedience.

5. (v. t.) To regard with suspicion; to hesitate at; to question.

6. (v. t.) To excite scruples in; to cause to scruple.

Pyrrhonism ace apprehension atom awake a doubt back down balance balk balk at bashfulness be diffident be doubtful be dubious be skeptical be uncertain beef better self bit bitch blench boggle boggling boycott call in question challenge complain complaint compunction conscience conscientiousness contest cry out against dab debate deliberate demonstrate demonstrate against demonstration demur demurral demurrer diffidence discomfort dispute distrust distrustfulness dole dot doubt doubtfulness dram dribble driblet dubiety dubiousness dwarf enter a protest exception expostulate expostulation falter faltering farthing fastidiousness fear fight shy of fleck flinch flyspeck fragment fret gag gobbet grain granule greet with skepticism grievance grievance committee groat hair half believe half-belief handful hang back hang off harbor suspicions have qualms have reservations hem and haw hesitance hesitancy hesitate hesitation hold off holler hover howl hum and haw indignation meeting iota jib jot kick leeriness little little bit lota make bones about march meticulousness minim minimum minutiae misdoubt misgive misgiving mistrust mistrustfulness mite modesty modicum molecule mote nonviolent protest nutshell object objection ounce overconscientiousness overscrupulousness pangs pangs of conscience particle pause pebble picket picketing pinch pittance point point of honor ponder press objections pricking of heart protest protest demonstration protestation pull back punctilio punctiliousness quail qualm qualm of conscience qualmishness qualms query question raise a howl raise a question rally recoil reconsideration reluctance remonstrance remonstrate remonstration retreat scrap scruples scrupulosity scrupulousness second thought second thoughts self-doubt shadow of doubt shilly-shally shred shrink shrink from shrinking shy shy at shyness sit in sit-in skepticalness skepticism smell a rat smidgen smitch speck spoonful spot squawk squeamishness state a grievance stick stick at stickle stickling stop to consider straddle the fence strain strain at strike stumble suspect suspicion suspiciousness teach in teach-in thimbleful think twice about throes throw doubt upon tiny bit tittle total skepticism touch of conscience treat with reserve trifling amount trivia twinge of conscience uncertainty uneasiness vacillate voice of conscience wariness waver whit wince withdraw worry yell bloody murder yield