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.
--------
Question: Category: guitar part 
Words: inlays, concerned, string, notes, fret

Answer: concerned


Question: Category: guitar part 
Words: truss rod, fret, neck, bored, strap lock

Answer: bored


Question: Category: moral characteristic 
Words: fair, brisk, ok, honorable, just

Answer:
brisk