Dull, continuous pains in your body, or the verb form meaning to have such pains.
From Old English 'acan,' of Germanic origin, possibly onomatopoetic in nature. The word has remained relatively unchanged for over a thousand years, showing how universal bodily pain is.
The word 'ache' is found across Germanic languages with nearly identical sounds—it's one of those fundamental words so old that it barely changed as languages split apart!
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