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

叹气	tàn qì	to sigh / to heave a sigh
感慨	gǎn kǎi	to sigh with sorrow, regret etc / rueful / deeply moved
感叹	gǎn tàn	to sigh (with feeling) / to lament
叹口气	tàn kǒu qì	to sigh
唉声叹气	āi shēng tàn qì	sighing voice, wailing breath (idiom) / to heave deep sighs / to sigh in despair
望而兴叹	wàng ér xīng tàn	to sigh (in dismay, admiration etc)
风声鹤唳	fēng shēng hè lì	lit. wind sighing and crane calling (idiom) / fig. to panic at the slightest move / to be jittery
叹息	tàn xī	to sigh; to gasp (in admiration)
唉	āi	interjection or grunt of agreement or recognition (e.g. yes, it's me!) / to sigh
悲叹	bēi tàn	to bewail / to sigh mournfully / to lament
悲叹	bēi tàn	to bewail / to sigh mournfully / to lament
欸	ǎi	(Tw) (literary) to rebuke loudly / (Tw) (literary) to sigh / used in 欸乃
舒一口气	shū yī kǒu qì	to heave a sigh of relief
诶	xī	sigh (to express regret)
唏嘘	xī xū	(onom.) to sigh / to sob
慨叹	kǎi tàn	to sigh with regret / lament
成串	chéng chuàn	to be lined up (like a chain of islands, a string of pearls etc) / to form a cluster (like a bunch of grapes) / to come one after the other (like a series of sighs)
嚝	hōng	to sigh / sound of a drum
付之一叹	fù zhī yī tàn	to dismiss with a sigh (idiom); a hopeless case
付之一叹	fù zhī yī tàn	to dismiss with a sigh (idiom); a hopeless case