mid-13c., probably a Middle English back-formation from sighte, past tense of Old English sican "to sigh," perhaps echoic of the sound of sighing. Related: Sighed; sighing.
sigh (n.)
early 14c., from sigh (v.).
权威例句
1. The country's politicians are already heaving a collective sigh of relief.
该国的政界人士均已松了口气。
2. Mr Collier heaved a sigh and got to his feet.
科利尔先生深叹一口气,站了起来。
3. The grandparents sigh and say how things have changed for the worse.
爷爷奶奶叹着气说情况变得如何如何糟糕。
4. With a sigh, she leant back and closed her eyes.