"Ear" is the Engpsh word for "耳朵". It is derived from the Old Engpsh word "eare", which is related to the German word "Ohr".
Examples:
I have a pain in my ear. (我的耳朵很疼。)
She cleaned wax out of her ear. (她清理了耳朵里的耳垢。)
He pstened carefully with both ears. (他用两只耳朵仔细听。)