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: relaxed, warm, assured, level, cool

A: warm
****
Q: fair, raining, equitable, impartial, unjust

A: raining
****
Q: concerned, strap lock, anxious, bored, fret

A:
strap lock
****