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
anxiety
apothecaries' unit
apothecaries' weight
fret
fuss
hesitate
niggle
pause
principle
question
wonder
scrupled
scruples
scrupling
circumspection
coquetry
hesitation
imaginings
misgiving
modesty
objection
provocation
qualm
reluctance
remorse
repugnance
restraint
reticence
self-consciousness
self-respect
sensitiveness
timidity
n-tuple
pupil
quadruple