noun / verb
blemish
BLEM-ish/ˈblemɪʃ/
A small imperfection that spoils something.
A small brown blemish marks the otherwise pristine red apple.

Etymology
Old French blemir connected making pale with staining or discoloring. English developed the sense “damage or disfigure,” and the noun came to name a flaw that mars something’s beauty or soundness.
In context
Jewels are an ornament to women but a blemish to men
More examples
- The scandal blemished his reputation.
- She inspected the fruit for blemishes.
- One mistake need not blemish an otherwise excellent record.
Forms
blemish · blemishes · blemished · blemishing