köken: From Proto-Iranian *čāt- / *čāθ- (“pit, well”), from an early derived form of Proto-Indo-Iranian *kanH- (“to dig”). Cognate with Sanskrit चात्वाल (cātvāla, “a hole in the ground for constructing the Uttara-vedi, performing oblations, or for sacrificial fire”).
köken: Uncertain. Possibly from Old Galician-Portuguese furaco, through Vulgar Latin *foraculum from Latin forāmen (“aperture, opening”). Compare Galician buraco, furaco, furado, Asturian furacu, buracu, Ladino burako, Leonese buraco, Spanish buraco; compare also, just for the card games, Italian burraco and Sicilian vurracu. Cf. also Catalan forat, Spanish horado. Or, possibly borrowed from Old High…
aile: buraco-branco, buraco-cinza, buraco-negro, sair do buraco, tapa-buracos, tapar buracos
köken: First attested in the Seokbo sangjeol (釋譜詳節 / 석보상절), 1447, as Middle Korean 굳 (Yale: kwut). The modern form is equivalent to 굳 (gut) + -엉 (-eong, diminutive suffix) + -이 (-i, noun suffix), and is first attested in the mid-nineteenth century.
köken: De Vaan dismisses any relation with Ancient Greek χειά (kheiá, “serpent's den”), and leaves the origin open. He notes that favissae (“underground cellars”) may or may not be related. Older theories derived the word from a Proto-Indo-European *bʰow- (“pit, hole”) (compare Proto-Germanic *būkaz (“belly”)).
köken: From Old Norse kúla (“swelling”), from Proto-Germanic *kūlǭ, cognate with Swedish kula (“bump”), German Kaule (dated), Kuhle (“hollow”, from Low German), Dutch kuil (“pit”).