constrains

verb
  1. 1

    To force physically, by strong persuasion or pressuring; to compel; to oblige.

  2. 2

    To keep within close bounds; to confine.

  3. 3

    To reduce a result in response to limited resources.

Source: https://en.wiktionary.org/wiki/constrain, https://en.wiktionary.org/wiki/constrains