köken: From the verb bucare, from buca, or from either Old Frankish *būk (“cavity, stomach”) or Gothic *𐌱𐌿𐌺𐍃 (*būks), both from Proto-Germanic *būkaz (“belly, torso”). Compare Occitan/Catalan buc ("torso; cow's chest"). More at bouk.
Cumpanzeddu camminava, povera bestia, ma oramai le sue zampe non lasciavano che buchi bianchi sulla neve bianca.
[Il gufo] s’è fatto un occhio nero nel tentativo di centrare, volando al buio un po’ alticcio, il buco nell’albero dove abita.
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: From pre-Middle Korean *kwùmùk, the modern form preserving the velar nature of the final consonant. First appeared in the seventeenth century as a distinctively Modern Korean form, displacing the Middle Korean form 구무 (Yale: kwùmwù), which still survives in some dialects.
From Middle High German muolter, multer, mulde, from Old High German muoltra, mulda, from Latin mulctra (“milking pail”). The modern form with -d- and without final -r- is Central and Low German; compare also Middle Low German molde, molle.