1) 悪化あっか #4,384 Inflections of 悪化 Class Suru verb Stem Inflected ending ✕ Link copied! Common N1 あっか [0] Meaning Shirabe Noun Suru verb Intransitive verb deterioration; getting worse; worsening; aggravation; degeneration; corruption 日ひが経たつにつれて、天気てんきは次第しだいに悪化あっかしつつあった。 The weather was getting worse and worse as the day went on. Kanji 悪 アク bad, vice, rascal 化 カ change, take the form of, influence Forms 悪化#4,384悪化あっかあっかあっか