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: aesthetic characteristic 
Words: fair, medium, size, light, loyal

Answer: loyal


Question: Category: moral characteristic 
Words: decent, impartial, light, fair, dishonest

Answer: light


Question: Category: emotional status 
Words: worried, angry, fret, sad, strap lock

Answer:
strap lock