1.adverb taking the 'to' particle
chattering (teeth)
2.adjectival nouns or quasi-adjectives (keiyodoshi)
(frozen, worried) stiff
3.adjectival nouns or quasi-adjectives (keiyodoshi); nouns which may take the genitive case particle 'no'
rigid (personality, thinking, etc.); inflexible; overly serious
4.adverb (fukushi); nouns which may take the genitive case particle 'no'
voracious (e.g. work, study); without slack or pause