challenge on

challenge someone on something

to dispute someone's statement, remarks, or position. I think Fred is wrong, but I won't challenge him on his estimate.

Name	Pronounced	Usage
Parvati	PAHR-vah-tee	Hinduism, Indian, Hindi
AmÉRico	ah-ME-ree-ko (Spanish)	Spanish, Portuguese
Murtagh	-	Irish
OfÉLia	-	Portuguese
Zowie	ZO-ee	English (Rare)
Enni	EN-nee	Finnish