無効
Common
Noun
I-adj
Noun
1
nouns which may take the genitive case particle 'no'adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi)
invalid;void;ineffective;unavailable
Antonym:
有効 (ゆうこう)
脅迫のもとになされた約束は無効だ。
A promise given under a threat is worthless.