Romanian word umiditate comes from Latin umidus

Detailed word origin of umiditate

Dictionary entry	Language	Definition
umidus	Latin (lat)	(figuratively) watery, weak. (of a river) formerly liquid, frozen. Moist, humid, damp, dank, wet.
humiditatem	Latin (lat)
umiditate	Romanian (ron)	Humidity.

Words with the same origin as umiditate