ineffective
Translation
ineffective, ineffectual
Examples
The medicine was ineffective against the virus.
The medicine was ineffective against the virus.
He was an ineffective leader.
He was an ineffective leader.
Grammar Patterns
ineffective ((against sth.)) not producing the desired result against something The medicine was ineffective against the virus.
Similar Words
Synonyms: useless, futile; Antonyms: effective, potent
Etymology
From the prefix 'in-' (not) + 'effective' (producing a result). Literally 'not effective'.
Memory Tips
Remember that the prefix 'in-' often means 'not'. So, ineffective is simply 'not effective'.