Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

[Q]: level, impartial, fair, tone, cool
[A]: impartial


[Q]: icy, hot, cool, refreshing, relaxed
[A]: relaxed


[Q]: apartment, mountain, flat, even, hill
[A]:
apartment