Meaning

noun an utterance made by exhaling audibly

noun a sound like a person sighing

verb heave or utter a sigh; breathe deeply and heavily

originFrom Middle English sighen (“to sigh”), back-formation from sighte, past tense form of siken, from Old English sīcan, from Proto-West Germanic *sīkan, perhaps ultimately from Proto-Indo-European *seykʷ- (“to pour out”).

Etymology from Wiktionary, CC BY-SA 3.0