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

偷袭	tōu xí	to mount a sneak attack / to raid
混入	hùn rù	to sneak into
越境	yuè jìng	to cross a border (usually illegally) / to sneak in or out of a country
钻心	zuān xīn	to sneak in / to infiltrate / to be piercingly painful / to be unbearable (of pain, itch etc)
贼喊捉贼	zéi hǎn zhuō zéi	lit. a thief crying "Stop the thief!" (idiom) / fig. to accuse sb of a theft and try to sneak away oneself / to cover up one's misdeeds by shifting the blame onto others
逃票	táo piào	to sneak in without a ticket / to stow away
抱头鼠窜	bào tóu shǔ cuàn	to cover one's head and sneak away like a rat (idiom); to flee ignominiously
挨近	āi jìn	to approach / to get close to / to sneak up on / near to
混进	hùn jìn	to infiltrate / to sneak into
偷跑	tōu pǎo	to sneak off; to slip away / (sports) to jump the gun; to make a false start / (fig.) to jump the gun; to start doing sth before it's allowed / (of a movie, game etc) to be leaked before the official release
翘班	qiào bān	to skip work / to sneak out of work early
抱头鼠蹿	bào tóu shǔ cuān	to cover one's head and sneak away like a rat (idiom); to flee ignominiously / also written 抱头鼠窜
潜近	qián jìn	to sneak up on
潜进	qián jìn	to sneak in / to infiltrate