expression, i-adjective
unfamiliar; strange; not recognized
Used when something or someone is not recognized from past experience. Often appears as a prenominal modifier (見覚えのない + noun).
見覚えのない番号から電話がかかってきた。
I got a call from an unfamiliar number.
彼は見覚えのない顔だった。
His face was unfamiliar to me.