Inherited from Old Spanish quajar, from Vulgar Latin *coaglāre/ *quaglāre, from syncopation of Latin coāgulāre. Doublet of coagular, a borrowing. Compare Aragonese cuallar, Asturian cuayar, Catalan quallar, Galician callar, French cailler.
Ćwicz mówienie i zapamiętywanie " cuajar " i wielu innych słów i zdań z hiszpański .