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: temperature 
Words: cold, cool, icy, assured, mild
assured

Category: personal characteristic 
Words: assured, refreshing, unruffled, cool, positive
refreshing

Category: food 
Words: bun, provision, frank, honest, wiener

honest