desvelar

to prevent someone from sleeping; to keep awake; to be unable to sleep; to be vigilant; to work tirelessly

From des- + velar, or more likely derived from Latin ēvigilāre (“awaken”), with the prefix des-, from Latin dis-; compare Portuguese desvelar, Catalan desvetllar, Occitan desvelhar.

to reveal, unveil

Related: desvelación, desvelador, desvelamiento, desvelo

Etymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *d(w)is- Proto-Italic *dis- Latin dis- Old Spanish des- Spanish des- Spanish velar Spanish desvelar From des- + velar (“to veil”).