• 耳鼻科じびか — ear, nose, and throat department
• 耳元みみもと — close to the ear
• 耳障りみみざわり — grating (to the ear)
• 耳打みみうち — whisper
• 寝耳ねみみに水みず — a complete surprise
• 早耳はやみみ — someone who hears news quickly
• 耳学問みみがくもん — knowledge gained by hearsay
• 耳みみを澄すます — to listen carefully
• 耳みみにする — to happen to hear

The kanji 耳 visually resembles the shape of an ear. In idioms like 耳寄りみみより (good news), it reflects how ears are used not only to hear but also to catch valuable information.

Another example is 耳学問みみがくもん — which means “secondhand knowledge” or learning by overhearing, without formal study.

耳みみで よく聞きいて下ください。
Please listen carefully with your ears.

彼かれの言葉ことばが 耳みみに残のこっています。
His words are still ringing in my ears.