D defs.my
Entry 1 sense Webster, 1913

Afoul

/əf-oul'/ · A·foul · IPA /əˈfaʊl/
01 adv. & a. In collision; entangled.
  1. 1.
    In collision; entangled.
Phrases & compounds
To run afoul of — to run against or come into collision with, especially so as to become entangled or to cause injury.