IPA: /əˈfaʊl/
KK: /əˈfaʊl/
In a situation where something is tangled or in conflict with something else.
The ship ran afoul of the rocks during the storm.
Afoul originates from the Middle English 'afoul', which is a combination of 'a-' (a prefix indicating a state or condition) and 'foul' (meaning dirty or unpleasant). The term describes a state of being in a foul condition or entangled in something undesirable.
Think of being in a 'foul' state, which helps you remember that 'afoul' means being in a bad or tangled situation.