cerebro

brain; nerd

Inherited from Old Spanish cerebro, an early borrowing from Latin cerebrum (“brain, skull”) (although influenced by the popular or Vulgar Latin pronunciation, with stress on the second syllable, in contrast to Portuguese cérebro; the variant celebro was the result of dissimilation), from Proto-Indo-European *ḱerh₂s- (“head”). In Old Spanish meollos was also used to refer to the brain.