buttressed

/B AH1 T R AH0 S T/
verb
  1. 1

    To support something physically with, or as if with, a prop or buttress.

  2. 2

    (by extension) To support something or someone by supplying evidence; to corroborate or substantiate.

adjective
  1. 1

    Having buttresses or supports.

    โ€œOnly the buttressed outer walls still stood .โ€

Source: https://en.wiktionary.org/wiki/buttress, https://en.wiktionary.org/wiki/buttressed