The only free and comprehensive online etymological dictionary of the Spanish language
pre- (Prefix) "before"
From Latin præ 'id.' From Proto-Italic *prai 'id.' From Proto-Indo-European *preh2 'id.'
Rare per- (e.g. perjuicio) via metathesis.
Indo-European
Italic
Oscan prai "before," Umbrian pre 'id.,' South Picene prai- 'id.'
Hellenic
Ancient Greek πάρα (pára) "beside," Mycenaean pa-ro "by"