sithe

As nouns the difference between sigh and sithe

is that sigh is a deep and prolonged audible inspiration or respiration of air, as when fatigued, frustrated, grieved, or relieved; the act of sighing while sithe is .

As verbs the difference between sigh and sithe

is that sigh is 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 while sithe is or sithe can be (dialect|dated) to sigh.

As an interjection sigh

is an expression of fatigue, exhaustion, grief, sorrow, frustration, or the like, often used in casual written contexts.