偷眼

偷眼	tōu yǎn	to take a furtive look at
偷	tōu	to steal / (bound form) thief / (bound form) secretly; on the sly
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