noun (common) (futsuumeishi)adjectival nouns or quasi-adjectives (keiyodoshi)nouns which may take the genitive case particle 'no'a su gusto;a sus anchas;con total libertad
Englishjmdict
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noun (common) (futsuumeishi)adjectival nouns or quasi-adjectives (keiyodoshi)nouns which may take the genitive case particle 'no'yojijukugobeing as free as the air;active without any restraint