Dutch word kostbaar comes from Dutch -baar (-able, indicates an action can be performed.), Dutch kost

Detailed word origin of kostbaar

Dictionary entry	Language	Definition
-baar	Dutch (nld)	-able, indicates an action can be performed.
kost	Dutch (nld)	(in the plural) expenses. (used absolutely, with definite article) board, livelihood, meals and lodgings. Cost, price. Food, nourishment.
kostbaar	Dutch (nld)	Valuable, precious.

Words with the same origin as kostbaar