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: moral characteristic 
Words: decent, impartial, light, fair, dishonest
light

Category: weather 
Words: windy, 70, mild, fair, loyal
loyal

Category: personal characteristic 
Words: persistent, icy, relaxed, cool, unflappalbe

icy