'arthrodynia' originates from Greek via New Latin/medical usage, specifically from Greek 'arthron' and 'odynē', where 'arthron' meant 'joint' and 'odynē' meant 'pain'.

'arthrodynia' was formed in medical Latin/Neo-Latin from the Greek elements 'arthron' + 'odynē' and entered English in medical contexts with the same compound form.

Initially it meant 'pain of a joint' in the original Greek compound sense, and over time it has retained the same medical meaning in English as 'joint pain'.