• 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.