sigh

Etymology 1

From 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”).

verb

1. (intransitive) To inhale a larger quantity of air than usual, and immediately expel it; to make a deep single audible respiration, especially as the result or involuntary expression of fatigue, exhaustion, grief, sorrow, frustration, or the like.
   When she saw it wasn't damaged, she sighed with relief.
   He sighed. It was going to be a long night.
   He sighed over the lost opportunity.
   A waiter brought his aperitif, which was a small scotch and soda, and as he sipped it gratefully he sighed. ‘Civilized,’ he said to Mr. Campion. ‘Humanizing.’ […] ‘Cigars and summer days and women in big hats with swansdown face-powder, that's what it reminds me of.’ 1963, Margery Allingham, chapter 5, in The China Governess
2. (intransitive) To lament; to grieve.
3. (transitive) To utter sighs over; to lament or mourn over.
   Ages to come, and men unborn, / Shall bless her name, and sigh her fate. 1695, Matthew Prior, An ode presented to the king, on His Majesty's arrival in Holland, after the Queen's death
   The lassie had grace given her to refuse, but with a woeful heart, and Heriotside rode off in black discontent, leaving poor Ailie to sigh her love. He came back the next day and the next, but aye he got the same answer. 1902, John Buchan, The Outgoing of the Tide
4. (intransitive) To make a sound like sighing.
5. (transitive) To exhale (the breath) in sighs.
   She sighed a sigh that was nearly a groan.
   sigh a note and sing a note
6. (transitive) To express by sighs; to utter in or with sighs.
   "I guess I have no choice," she sighed.
   She sighed her frustrations.
   The gentle swain […] sighs back her grief. 1763, Torquato Tasso, translated by John Hoole, Jerusalem Delivered

Etymology 2

From Middle English sighe (“sigh”), from sighen (“to sigh”) (see [[#Etymology 1]]).

noun

1. A deep, prolonged audible inhale and exhale of breath; as when fatigued, frustrated, grieved, or relieved; the act of sighing.
2. (figurative) a manifestation of grief; a lament.
3. (Cockney rhyming slang) A person who is bored.

intj

1. An expression of fatigue, exhaustion, grief, sorrow, frustration, or the like, often used in casual written contexts.
   Sigh, I'm so bored at work today.