Cuco
/ˈku.ko/noun
A Spanish and Portuguese word meaning “cuckoo,” also used in Hispanic folklore for a frightening bogeyman who threatens misbehaving children.
Did you know?In many Spanish-speaking communities, El Cuco is invoked much like the English boogeyman—an unseen figure said to carry away children who refuse to behave.
Etymological Timeline
Proto-Indo-European / sound-symbolic root
PIE
*kuku-
“A bird-call imitation associated with the cuckoo; the deeper reconstruction is uncertain because the form is likely onomatopoeic.”
Ancient Greek
Greek
κόκκυξ (kókkyx)
“Cuckoo; a name imitating the bird’s call.”
Classical Latin
Latin
cucūlus
“Cuckoo, the bird whose distinctive call supplied its name.”
Medieval Romance
Romance
*cuccu / cuco
“A shortened Romance form referring to the cuckoo bird.”
Medieval Spanish and Portuguese
Spanish/Portuguese
cuco
“Cuckoo; in Spanish, also an adjective meaning clever, crafty, or neat in some contexts.”
Early Modern to Modern Spanish
Spanish
el Cuco
“A folkloric bogeyman or child-threatening monster, likely shaped by the broader tradition of the coco or boogeyman.”