(to produce) a mark etc. that spoils the beauty or perfection

flaw

something that lessens the value, beauty or perfection of a thing

imperfection

the state of being imperfect; a fault (the usual word)

flaw

(the state of having) a badly formed or shaped parts

deformity

a dry crust formed over a wound or sore; a worker who refuses to join a strike or who takes a striker's job

blemish from previous injury or illness

a mark on the skin caused by a cut or other injury

blemish from previous injury or illness

a mark of shame or disgrace; the part of a flower that receives pollen

shame

unattractiveness

unattractiveness