DICT.TW Dictionary Taiwan

 swel·ter /ˈswɛltɚ/
 (vi.)悶熱,被暑氣所苦,汗流夾背(vt.)使悶熱,使中暑悶熱

 Swel·ter v. i. [imp. & p. p. Sweltered p. pr. & vb. n. Sweltering.]
 1. To be overcome and faint with heat; to be ready to perish with heat. “Sweltered cattle.”
 2. To welter; to soak. [Obs.]

 Swel·ter, v. t.
 1. To oppress with heat.
 2. To exude, like sweat. [R.]
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 swelter
      v 1: be uncomfortably hot
      2: suffer from intense heat; "we were sweltering at the beach"