inefficaciousness

Từ điển WordNet v3.1 - WordNet Dictionary

noun

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

• Từ trái nghĩa / Antonyms:
  efficacy, efficaciousness