IPA: /ˈɪəreɪk/
KK: /ˈɪrˌeɪk/
A feeling of pain or discomfort in the ear.
She couldn't concentrate in class because of her earache.
Earache → It is formed from "ear" (from Old English "eare", meaning the organ of hearing) and "ache" (from Old English "ace", meaning pain). The word "earache" refers to pain in the ear.
Think of the word 'ear' as the organ that hurts, and 'ache' means pain. So, an earache is simply pain in the ear.