the outer [middle; inner] ear; 外[中; 内]耳
go in at one ear and out at the other; 左耳进右耳出
ears of a tripod; 鼎耳
an edible fungus; 木耳
side rooms; 耳房
side doors 耳门
Er Yuanming 耳元明
It's only five li from here. 距此不过五里耳。
牛津高阶第八版
美国韦氏词典
Dictionary.com
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维基百科 (自由的百科全书)