WordReference Random House Learner's Dictionary of American English © 2026
tight•en /ˈtaɪtən/USA pronunciation   v. 
  1. to (cause to) become tight or tighter: [no object]could feel his chest tighten with anxiety.[+ object]to tighten rules regarding immigration.
Idioms
  1. Idioms tighten one's belt, to respond to difficult times by reducing one's spending:The family had to tighten their belts so the children could go to college.

tight•en•er, n. [countable]

WordReference Random House Unabridged Dictionary of American English © 2026
tight•en  (tītn),USA pronunciation v.t., v.i. 
  1. to make or become tight or tighter.
  • tight + -en1 1720–30
tighten•er, n. 
    secure, anchor, fasten.

'tightener' also found in these entries (note: many are not synonyms or translations):

Forum discussions with the word(s) "tightener" in the title:


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