Answer:
Merrily is the adverb.
Explanation:
An adverb is a word or an expression that modifies a verb, adjective, determiner, clause, preposition, or sentence. Adverbs typically express manner, place, time, frequency, degree, level of certainty, etc
It means that nobody lives long enough to make every mistake so when someone makes a mistake learn from it so you wont make the same one.
Its kinda self explanatory
a
hope this helps