悪化

• Reading: あっか
• Romaji: akka
• Kanji breakdown: 悪 (aku/waru) — bad, evil, wrong; 化 (ka/ba) — change, transform, -ification
• Pronunciation: /ak.ka/

Meaning

Deterioration; worsening. The process of becoming worse in quality, condition, or severity.

A noun and suru-verb (intransitive) used to describe situations, conditions, or relationships becoming worse. Common in medical contexts (symptoms worsening), economic contexts (recession deepening), and interpersonal contexts (relations deteriorating). The opposite is 改善 (kaizen, improvement). Frequently paired with する to form the verb 悪化する (to worsen/deteriorate).

Examples

1. 天候が悪化して登山を中止した。 The weather deteriorated, and we canceled the mountain climb.
2. 治療しなければ症状が悪化する恐れがある。 If left untreated, there is a risk the symptoms will worsen.
3. 両国の関係は急速に悪化している。 Relations between the two countries are rapidly deteriorating.

Usage Guide

Context: health, weather, economics, diplomacy

Tone: negative

Origin & History

From Sino-Japanese: 悪 (aku, bad/evil) + 化 (ka, change/transform). Literally 'transformation into badness' — the process of becoming worse.

Cultural Context

Era: Modern

Generation: All ages

Social background: Universal