霎眼

霎眼	shà yǎn	to blink / in an instant / in the twinkle of an eye
霎	shà	all of a sudden / drizzle
眼	yǎn	eye (CL:只,双) / (often used with 一) a look; a glance / small hole / (bound form) salient point / classifier for wells, cave-dwellings etc