tightens

/T AY1 T AH0 N Z/
verb
  1. 1

    To make tighter.

    โ€œPlease tighten that screw a quarter-turn.โ€

  2. 2

    To become tighter.

    โ€œThat joint is tightening as the wood dries.โ€

  3. 3

    To make money harder to borrow or obtain.

    โ€œIf the government doesn't tighten the money supply, inflation is certain to be harsh.โ€

  4. 4

    To raise short-term interest rates.

    โ€œThe Fed is expected to tighten by a quarter-point.โ€

Antonyms

Source: https://en.wiktionary.org/wiki/tighten, https://en.wiktionary.org/wiki/tightens