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: weather 
Words: fair, unprejudiced, raining, windy, endure
unprejudiced

Category: animal 
Words: fish, bat, sea turtle, trap, goat
trap

Category: direction 
Words: left, descending, down, emotional, backward

emotional