-athon Definition
əthän
suffix
An activity that continues for an extended period of time.
Phonathon; talkathon.
American Heritage
Used to form words meaning a greatly extended period of any activity, usually for the purpose of fundraising.
Wiktionary
affix
An event marked by length or endurance.
Walkathon, drinkathon; sale-a-thon.
Webster's New World
Origin of -athon
-
Back-formation from marathon.
From Wiktionary
From (mar)athon
From American Heritage Dictionary of the English Language, 5th Edition
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