noun, masculine/tɾaɡaˈluθ/plural: tragaluces
skylight
“El amplio tragaluz […] es invisible: se encuentra en la cuarta pared y […] proyecta sobre la estancia la sombra de su reja.” — The large skylight […] is invisible: it is found on the fourth wall and […] projects the shadow of its grating onto the room.
Synonyms: claraboya
Verb-object compound, composed of traga (“to swallow”) + luz (“light”). Literally, “light swallower”.