unwirksam
Translation
ineffective, ineffectual, invalid
Examples
Das Medikament war leider unwirksam.
Unfortunately, the medicine was ineffective.
Der Vertrag wurde für unwirksam erklärt.
The contract was declared invalid.
Grammar Patterns
sth. is unwirksam sth. is ineffective The medicine was unwirksam.
to declare sth. unwirksam to declare sth. invalid The judge declared the contract unwirksam.
Similar Words
Synonyms: ineffectual, useless; Antonyms: effective, effectual
Etymology
Composed of un- (not) + wirksam (effective). So, 'not effective'.
Memory Tips
Break it down: un- (not) + wirk- (from 'wirken', to work/affect). If something is not working, it's 'unwirksam'.