quickly
quickly
Adverb
This adverb describes both physical velocity and the brevity of time elapsed between an action and its result. While it often refers to speed, it also carries a strong connotation of efficiency or immediacy, as in reacting without hesitation.
In contrast to "fast," which primarily describes the rate of motion, "quickly" is more versatile and frequently used to describe the rapid completion of a task or a sudden change in mental state. It is suitable for all registers, from casual conversation to formal writing.