TASK DEFINITION: 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.
PROBLEM: Category: emotional status 
Words: worried, angry, jack, fret, emotional upsets

SOLUTION: jack

PROBLEM: Category: physical property 
Words: obese, heavy, area, chunky, fat

SOLUTION: heavy

PROBLEM: Category: aesthetic characteristic 
Words: well, medium, size, loyal, fair

SOLUTION:
loyal