blemish

(noun) a mark or flaw that spoils the appearance of something (especially on a person's body). Synonyms: defect, mar. Example: "A facial blemish."

(verb) mar or spoil the appearance of. Synonyms: deface, disfigure. Examples: "Scars defaced her cheeks." "The vandals disfigured the statue."

(verb) mar or impair with a flaw. Synonyms: spot. Example: "Her face was blemished."

(verb) add a flaw or blemish to; make imperfect or defective. Synonyms: flaw.