[swel.ter] vb swel.tered ; swel.ter.ing [ME sweltren, freq. of swelten to die, be overcome by heat, fr. OE sweltan to die; akin to Goth swiltan to die] vi (14c) 1: to suffer, sweat, or be faint from heat
2: to become exceedingly hot "in summer, the place ~s" ~ vt 1: to oppress with heat
2. archaic: exude "~ed venom --Shak."
[2]swelter n (1851) 1: a state of oppressive heat
2: welter
3: an excited or overwrought state of mind: sweat "in a ~"