ταχὺ [3 verses](adv/adj sg neut nom/acc) "Swiftly" is tachy means "swift", "fleet", "quick", "hasty", "rapid", "sudden," and "short." It appears is an adjective, but  Jesus always uses this form as an adverb meaning "swiftly" and "hastily." -- --  The "quickly" here is not in the normal adverb form bu,t in the three times Jesus uses this word, he always uses it in this form as an adverb, which means "swiftly" and "hastily." As is often the case, this unusual form of the Greek adverb originates in the Septuagint, where it is used many time starting at Genesis 27:20.