simple past and past participle of mark

An adjective "marked" refers to something that has a visible or identifying mark, and can also describe a playing card with a secret mark on the back for cheating.

Clearly evident; noticeable; conspicuous.

(linguistics, of a word, form, or phoneme) Distinguished by a positive feature.

Singled out; suspicious; treated with hostility; the object of vengeance.

(of a police vehicle) In police livery, as opposed to unmarked.