Binding(adjective)
That must be obeyed because it is accepted in law.
Hindi meaning:बाध्यकारी
Synonyms: Irrevocable, Unalterable, Mandatory, Imperative, Obligatory
Antonyms: Optional, Voluntary, Unnecessary, Inessential
Example: The decision is binding on both parties.
Trick to remember: Binding means jo bandh ke rakhe – बाध्यकारी. 
