sweatbox

/ˈswɛtˌbɑks/
noun
  1. A small, enclosed space that becomes very hot, used for sweating, such as a sauna or steam room.
    • Ancient cultures used sweatboxes for purification rituals.
    • The spa had a traditional sweatbox made of cedar wood.
    • He sat in the sweatbox for fifteen minutes to relax his muscles.
  2. A very hot, stuffy, and uncomfortable room or vehicle.
    • The old car without air conditioning turned into a sweatbox on summer days.
    • They complained that the crowded bus was a sweatbox during the heatwave.
    • The tiny office with no windows was a sweatbox in July.
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