MDBG Mobile Chinese English Dictionary (iPhone, Android, Windows Phone)

偷窥	tōu kuī	to peep / to peek / to act as voyeur
偷看	tōu kàn	to peep / to peek / to steal a glance
窥	kuī	to peep / to pry into
窥探	kuī tàn	to pry into or spy on / to snoop / to peep / to poke one's nose into / to peer / to get a glimpse of
阚	kàn	to glance / to peep
张望	zhāng wàng	to look around / to peep (through a crack) / to peer at / to throw a look at
窥望	kuī wàng	to peep / to spy on
觑窥	qù kuī	to peep at
窥视	kuī shì	to peep at / to spy on / to peek