diminishing

verb
  1. 1

    To make smaller.

  2. 2

    To become smaller.

  3. 3

    To lessen the authority or dignity of; to put down; to degrade; to abase; to weaken; to nerf (in gaming).

  4. 4

    To taper.

  5. 5

    To disappear gradually.

  6. 6

    To take away; to subtract.

noun
  1. 1

    A diminishment.

adjective
  1. 1

    Becoming smaller

Source: https://en.wiktionary.org/wiki/diminish, https://en.wiktionary.org/wiki/diminishing