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: moral characteristic 
Words: mild, equitable, unprejudiced, trustworthy, fair

Answer: mild


Question: Category: animal 
Words: fish, iguana, canyoning, hamster, horse

Answer: canyoning


Question: Category: animal 
Words: waggle, ant, pounce, fly, wave

Answer:
wave