一夕

一夕	yī xī	overnight; instantly; very quickly
一	yī	one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit
夕	xī	(bound form) sunset; dusk / (bound form) evening; night / Taiwan pr. [xi4]