The only free and comprehensive online etymological dictionary of the Spanish language
abrir m. (Noun, Verb) "opening;" "open"
12th cent. From Latin aperire "to open." From Proto-Italic *ap-wer-je- 'id.' The first element *ap- is from *h2ep- "off," "away" (see ab-); the rest is from Proto-Indo-European *h2u̯er-i̯e/o- "to cover." A primary i̯e/o-present.
Asturian abrir, Portuguese abrir, Catalan obrir, French ouvrir, Italian aprire, Aromanian apir, Sardinian abbèrrere