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.

Category: emotional status 
Words: left, emotional state, sad, emotional upsets, down
left

Category: weather 
Words: brisk, fair, sunny, cold, balanced
balanced

Category: boats 
Words: deck, pack, bow, hull, rudder

pack