-athon


a suffix extracted from marathon, occurring as the final element in compounds which have the general sense “an event, as a sale or contest, drawn out to unusual length, often until a prearranged goal, as the contribution of a certain amount of money, is reached”: walkathon; readathon.

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Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?
Also -a-thon, -thon.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020