Meaning

noun a part of a river where the current is very fast

adjective done or occurring in a brief period of time

adjective characterized by speed; moving with or capable of moving with high speed

originEtymology tree Proto-Indo-European *h₁reh₁p- Proto-Indo-European *h₁rp-i-der. Proto-Italic *rapjō Latin rapiō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin rapidusder. Middle French rapidebor. ▲ Latin rapidusbor. English rapid Borrowed from Middle French rapide and its etymon Latin rapidus.

Etymology from Wiktionary, CC BY-SA 3.0