• 鏡台きょうだい — dressing table
• 眼鏡めがね — glasses; spectacles
• 鏡餅かがみもち — traditional round rice cake for New Year

鏡 is a phono-semantic compound: 金 (metal) + 京 (phonetic). Originally metal mirrors polished to shine, it now also works metaphorically for reflection of truth, character, or history.

鏡かがみを 見みて、髪かみを 整ととのえます。
I check the mirror and fix my hair.

彼女かのじょは 鏡かがみの 前まえで 立たち 止どまりました。
She stopped in front of the mirror.