missive

/หˆmษชsษชv/
noun
  1. 1

    A written message; a letter, note or memo.

  2. 2

    (in the plural) Letters sent between two parties in which one makes an offer and the other accepts it.

  3. 3

    One who is sent; a messenger.

adjective
  1. 1

    Specially sent; intended or prepared to be sent.

    โ€œa letter missiveโ€

  2. 2

    Serving as a missile; intended to be thrown.

Source: https://en.wiktionary.org/wiki/missive