zwingend
Translation
mandatory, compelling, essential, imperative
Examples
Das ist ein zwingender Grund.
That is a compelling reason.
Eine Anmeldung ist zwingend erforderlich.
Registration is mandatory.
Grammar Patterns
as an adjective modifying a noun a compelling proof
as an adverb modifying an adjective sth. is absolutely necessary
Similar Words
Synonyms: obligatorisch, notwendig; Antonyms: freiwillig, optional
Etymology
The present participle of the verb 'zwingen' (to force, compel). It describes something that is 'forcing' or 'compelling'.
Memory Tips
Think of the verb 'to swing' someone's opinion, 'zwingen' has a similar forceful sound and meaning.