“Deterioration” in Japanese
Short answer
Deterioration in Japanese is “悪変” (akuhen). Full meaning: deterioration, change for the worse.
Other ways to say “Deterioration” in Japanese
劣化
rekka deterioration (in quality, performance, etc.), degradation, worsening; (visible) aging, becoming unattractive (due to aging)
悪化
akka deterioration, getting worse, worsening, aggravation, degeneration, corruption
老廃
rouhai deterioration (due to age), wearing out, expiration
老朽化
roukyuuka deterioration, becoming decrepit, becoming worn out
腐朽
fukyuu decay, deterioration, rot
増悪
zouaku worsening, deterioration, exacerbation, aggravation (of a disease)
退歩
taiho retrogression, degeneration, deterioration
改悪
kaiaku changing (something) for the worse, disimprovement, deterioration
レベルダウン
reberudaun decrease in level, deterioration, decline
変質
henshitsu alteration (of character or essence), change in quality, transformation, deterioration, degeneration, transmutation; perversion (esp. sexual)
低下
teika fall, decline, lowering, deterioration, degradation
Looking for the other direction? Search any Japanese word in the Nihoner lexicon, or practise what you have learned in the learning games.