Which one of the following words does not belong with the others and why?
Father
Aunt
Sister
Cousin
Mother
Uncle
You and your sister have the same parents.
Your father, mother, aunt, and uncle have the same sets of parents -- your two pairs of grandparents.
However, your cousin has one set of grandparents in common with you, but a different set of grandparents on the other side.
1 answer
Therefore, the word that does not belong with the others is "Cousin".