inefficacy

Từ điển Oxford Learners Wordfinder Dictionary

noun

a lack of efficacy
• Syn:
inefficaciousness
• Ant:
efficacy
• Derivationally related forms:
inefficacious (for: inefficaciousness)
• Hypernyms:
ineffectiveness, ineffectualness, ineffectuality

• Từ trái nghĩa / Antonyms:
  efficacy, efficaciousness