effectiveness
Translation
effectiveness, efficacy
Examples
We need to measure the effectiveness of the campaign.
We need to measure the effectiveness of the campaign.
Grammar Patterns
the effectiveness of ((sth.)) the quality of producing a desired result from (sth.) The effectiveness of the new drug is being tested.
Similar Words
Synonyms: efficacy, efficiency; Antonyms: ineffectiveness
Etymology
From 'effective' + '-ness' (noun suffix indicating a state or quality). 'Effective' means producing a desired result.
Memory Tips
Focus on the '-ness' ending, which turns the adjective 'effective' (having an effect) into a noun (the quality of having an effect).