悪化（あっか、aっka）
- deterioration

The Japanese word 悪化 (あ っか) means "worsening," "deterioration," or "aggravation." It refers to a situation, condition, or state becoming worse or declining in quality, intensity, or severity. This can apply to various things, such as health, weather, relationships, or economic conditions. The word often implies a negative change or a process of decline.

⚫︎病状が悪化］しました。 Translation: The condition worsened. ⚫︎経済状況が悪化］する一方です。 Translation: The economic situation is steadily worsening. ⚫︎風邪が悪化］して、熱が出てきた。 Translation: The cold got worse, and I developed a fever.

⚫︎You can use 悪化 in both formal and informal contexts. ⚫︎ It's frequently used to describe negative changes, often implying that something is getting worse. ⚫︎ It is appropriate when discussing things that are declining in condition or getting less positive.

⚫︎ The word is typically written with the kanji 悪 (aku, meaning "bad" or "evil") and 化 (ka, meaning "change" or "become"). ⚫︎ The hiragana reading is あっか. ⚫︎ The okurigana (the hiragana after the kanji) is sometimes included as 悪化］する (akka suru), but the kanji form 悪化 alone can also be used as a noun.

⚫︎ 劣化 (rettaka) - deterioration, degradation ⚫︎ 低下 (teika) - decline, fall ⚫︎ 悪くなる (waruku naru) - to get worse ⚫︎ 劣化する (rettaka suru) - to deteriorate

⚫︎ 改善 (kaizen) - improvement ⚫︎ 好転 (kouten) - turn for the better ⚫︎ 良くなる (yoku naru) - to get better ⚫︎ 回復 (kaifuku) - recovery

彼の体調は最近悪化］している。 ・Translation: His physical condition has been worsening recently. ・Explanation: This sentence describes the deterioration of someone's health.

この問題は解決策を見つけないと、状況が更に悪化］するだろう。 ・Translation: If we don't find a solution to this problem, the situation will worsen further. ・Explanation: This sentence suggests that the situation will become more negative if a solution isn't found.

The word 悪化 is formed from the combination of two kanji: 悪 (aku), meaning "bad" or "evil," and 化 (ka), which means "to change" or "to transform." Therefore, it literally means a "change to bad" or "worsening."