Below are possible answers for the crossword clue Tightening.
11 letter answer(s) to tightening
CONTRACTION
(physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
a word formed from two or more words by omitting or combining some sounds; "`won't' is a contraction of `will not'"; "`o'clock' is a contraction of `of the clock'"
the act of decreasing (something) in size or volume or quantity or scope
the process or result of becoming smaller or pressed together; "the contraction of a gas on cooling"
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