IPA: /fərˈbɪd.əns/
KK: /fərˈbɪd.əns/
A rule or order that prevents someone from doing something.
The forbiddance of smoking in public places has improved air quality.
Forbiddance is formed from "forbid" (from Old English "forbiddan", meaning to prohibit or refuse) and the suffix "-ance" (meaning the state or quality of). The word refers to the state of being prohibited or the act of forbidding something.
Think of the act of prohibiting something ('forbid') and the state or quality of that prohibition ('-ance'). This helps you remember that forbiddance means the state of being forbidden.