- sairentokiraa silent killer
Used in medical or metaphorical contexts to describe a disease or problem that shows no obvious symptoms but can be fatal or destructive.
高血圧はサイレントキラーだ。
Ketsuatsu wa sairentokiraa da.
High blood pressure is a silent killer.
ストレスはサイレントキラーになることもある。
Sutoresu wa sairentokiraa ni naru koto mo aru.
Stress can also become a silent killer.
⚖️ Commonly confused with 'muhyoujou' (無表情), but that means expressionless, not silent killer.
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