Definition of -athon in English:

-athon

suffix

Forming nouns denoting an action or activity which is carried on for a very long time or on a very large scale, typically to raise funds for charity: talkathon walkathon

Origin

on the pattern of (mar)athon.

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Word of the day apposite
Pronunciation: ˈapəzɪt
adjective
apt in the circumstances or relation to something