instruction:
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: type of rigidity 
Words: solid, leverage, hard, unbending, firm
answer:
leverage


question:
Category: construction 
Words: windlass, crane, dump truck, pelican, digger
answer:
pelican


question:
Category: moral characteristic 
Words: dishonest, impartial, brisk, fair, honorable
answer:

brisk