untighten

transitive verb

un·​tighten

"+

: to make less tight : loosen

an expulsion of breath untightens the chest

—William Faulkner

Word History

Etymology

un- entry 2 + tighten

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Rhymes for untighten

• enlighten
• exciton
• brighten
• chitin
• frighten
• heighten
• lighten
• phaeton
• tighten
• titan
• triton
• whiten