clinches

verb
  1. 1

    To clasp; to interlock.

  2. 2

    To make certain; to finalize.

    โ€œI already planned to buy the car, but the color was what really clinched it for me.โ€

  3. 3

    To fasten securely or permanently.

  4. 4

    To bend and hammer the point of (a nail) so it cannot be removed.

  5. 5

    To embrace passionately.

  6. 6

    To hold firmly; to clench.

  7. 7

    To set closely together; to close tightly.

    โ€œto clinch the teeth or the fistโ€

Source: https://en.wiktionary.org/wiki/clinch, https://en.wiktionary.org/wiki/clinches