adjectival nouns or quasi-adjectives (keiyodoshi)nouns which may take the genitive case particle 'no'noun (common) (futsuumeishi)
1.worst adjectival nouns or quasi-adjectives (keiyodoshi)interjection (kandoushi)colloquial
2.horrible; horrid; awful; terrible
adverb (fukushi)colloquial
3.in the worst case; if worst comes to worst