Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
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Question: Category: type of rigidity 
Words: solid, leverage, hard, unbending, firm

Answer: leverage


Question: Category: activity 
Words: fried, spend, whittle, waste, fritter

Answer: fried


Question: Category: emotional status 
Words: detached, acceptable, mad, exquisite, fine

Answer:
exquisite