bashful
bashfulness
boggle
boggling
cautious
compunction
demur
demurral
demurring
diffidence
diffident
falter
faltering
hesitance
hesitancy
hesitant
hesitating
hesitation
jibbing
modest
modesty
objection
pause
protest
qualm
qualm of conscience
qualmish
qualmishness
recoil
scruple
scrupling
scrupulosity
scrupulous
scrupulousness
shilly-shallying
shrinking
shy
shyness
squeamish
sticking
straining
tentative
timid