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]: cool, unruffled, funny, chill, ethical
[A]: chill


[Q]: goose, cow, bend, lion, duck
[A]: bend


[Q]: exquisite, fine, acceptable, comfortable, mad
[A]:
exquisite