firmed

verb
  1. 1

    To make firm or strong; fix securely.

  2. 2

    To make compact or resistant to pressure; solidify.

  3. 3

    To become firm; stabilise.

  4. 4

    To improve after decline.

  5. 5

    To shorten (of betting odds).

  6. 6

    To select (a higher education institution) as one's preferred choice, so as to enrol automatically if one's grades match the conditional offer.

Source: https://en.wiktionary.org/wiki/firm, https://en.wiktionary.org/wiki/firmed