The only free and comprehensive online etymological dictionary of the Spanish language
célere (Adjective) "fast"
Borrowed sometime before the 15th cent. from Latin celerem, accusative of celer "swift." From Proto-Italic *keli-ri- 'id.' A dissimilation of *keli-li-, from Proto-Indo-European *kel-i̯- "speeding" and suffix *-li̯- (see -al (2)).
Indo-European
Germanic
Gothic haldan "to feed," Old Norse halda "to hold," Old Saxon haldan 'id.,' Old High German haltan 'id.,' Old English healdan 'id.' (English to hold)
Hellenic
Ancient Greek κέλλειν (kéllein) "to drive on," "to harbor"
Indo-Iranian
Sanskrit kaláyati