imperviousness

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the quality of being impenetrable (by people or light or missiles etc.)
• Syn:
impenetrability
• Ant:
perviousness, penetrability (for: impenetrability)
• Derivationally related forms:
impervious, impenetrable (for: impenetrability)
• Hypernyms:
quality

• Từ trái nghĩa / Antonyms:
  penetrability, perviousness