gwallt m (uncountable)
From Proto-Celtic *woltos (compare Cornish gols, Old Breton guolt, Irish folt), from Proto-Indo-European *u̯el(ə)- (compare English wold, Lithuanian váltis (“oat awn”), Serbo-Croatian vlât (“ear (of wheat)”), Ancient Greek λάσιος (lásios, “hairy”)). Related to gwellt.