The Collaborative International Dictionary
Swelt \Swelt\, obs. imp. of Swell.
Swelt \Swelt\, v. i. [OE. swelten to die, to swoon or faint, AS. sweltan to die; akin to OD. swelten to hunger, to fail, OS. sweltan to die, Icel. svelta to die, to hunger, Sw. sv["a]lta to hunger, Dan. sulte, Goth. sviltan to die. Cf. Swelter, Sweltry.]
To die; to perish. [Obs.]
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To faint; to swoon. [Obs.]
--Chaucer.Night she swelt for passing joy.
--Spenser.
Swelt \Swelt\, v. t.
To overpower, as with heat; to cause to faint; to swelter.
[Obs. or Prov. Eng.]
--Bp. Hall.
Wiktionary
Etymology 1 vb. 1 (context obsolete outside dialects English) To die. 2 (context obsolete outside dialects English) To succumb or be overcome with emotion, heat, etc.; to faint or swelter Etymology 2
vb. (context obsolete English) (en-simple past of: swell)