köken: Inherited from Old Spanish clavo, from Latin clāvus. The conservation of Latin /kl-/ is irregular (normally the result is /ʎ/, but cf. claro), which might imply a degree of Latin influence. Still, it is difficult to regard such a mundane term as learned or even semi-learned. First attested in the twelfth century. Compare Portuguese cravo.
aile: agarrarse a un clavo ardiendo, árbol del clavo, arrimar el clavo, clavete, clavetear, clavo de chilla, clavo de olor, clavo de rosca, como un clavo, dar en el clavo
köken: Borrowed from French migraine, from Middle French migraine, from Old French migraigne, from Late Latin hēmicrānia (“pain in one half of the head”), from Ancient Greek ἡμικρανία (hēmikranía), calque of Egyptian gs-tp (“headache”).