type of cheese, 1660s (but the cheese presumably was made long before that), from Cheddar, village in Somerset, England, where it originally was made, from Old English Ceodre (c.880), probably from ceodor "ravine" (there is a striking gorge nearby).
check-list
checkmate
checkout
checkpoint
check-up
cheddar
cheek
cheeks
cheeky
cheep
cheer