/swel"teuhr/ , v.i.
1. to suffer from oppressive heat.
v.t.
2. to oppress with heat.
3. Archaic. to exude, as venom.
n.
4. a sweltering condition.
[ 1375-1425; late ME swelt ( e ) ren (v.), equiv. to swelt ( en ) to be overcome with heat (OE sweltan to die; c. ON svelta, Goth swiltan ) + -eren -ER 6 ]