mortises

/M AO1 R T IH0 S IH0 Z/
noun
  1. 1

    A hole that is made to receive a tenon so as to form a joint.

  2. 2

    Stability; power of adhesion.

verb
  1. 1

    To cut a mortise in.

  2. 2

    To join by a mortise and tenon.

  3. 3

    To adjust the horizontal space between selected pairs of letters; to kern.

Source: https://en.wiktionary.org/wiki/mortise, https://en.wiktionary.org/wiki/mortises