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.

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

[EX Q]: color, variety, well, fair, decent
[EX A]: decent

[EX Q]: metal, panel, wood, glass, knife
[EX A]:
knife