IPA: /ɪnˈdʒɔɪn/
KK: /ɪnˈdʒɔɪn/
To order someone to do something or to prohibit them from doing something, often with a sense of authority.
The judge decided to enjoin the company from continuing its harmful practices.
Past: enjoined
Past Participle: enjoined
Enjoin is formed from "en-" (meaning to cause to be in) and "jungere" (meaning to join). The word means to cause someone to join or to command someone to do something.
Think of being 'caused to join' ('en-') in a command ('jungere') — that's why enjoin means to command someone to do something.