The words ⟨lämmin⟩ and ⟨hapan⟩ only, and their compound words; inverse qualitative consonant gradation.
Declension is akin to type 34 (onneton). The inflectional stem is formed by replacing the final ⟨-n⟩ with ⟨-mä-⟩, and strengthening the preceding consonant or consonant cluster. The final ⟨-a-⟩/⟨-ä-⟩ is dropped before the plural marker ⟨-i-⟩.
Partitive singular ending ⟨-ta⟩/⟨-tä⟩, partitive plural ending ⟨-a⟩/⟨-ä⟩ and standard genitive plural ending ⟨-en⟩.