apagón
/apaˈɡon/ · B2 · noun · m
blackout
💡🔌 a- (off) + pagón sounds like 'pah-GONE': the power is gone
Apagón comes from apagar, 'to turn off or put out', plus the augmentative -ón, meaning a big one. So it is a big switching-off. Hear 'ah-pah-GONE': the lights are gone.