Translation guide
The English word 'hazardous' describes something that is dangerous or risky, often in a formal or technical context. In Japanese, the most common equivalent is 危険な (kiken na), but other expressions exist depending on the nuance: physical danger, health risks, or figurative risk.
To describe something that poses a danger or risk, in a general sense.
The most common and versatile adjective meaning 'dangerous' or 'hazardous'. It can be used for physical dangers, health risks, and figurative risks.
This road is hazardous at night.
hazardous chemicals
Means 'harmful' or 'toxic', often used for substances or environments that are hazardous to health.
Hazardous gas was emitted.
A more casual adjective meaning 'dangerous'. It can be used in everyday conversation but is less formal than 危険な.
It's hazardous to do that.
Specifically referring to substances, materials, or conditions that are harmful to human health.
A phrase meaning 'harmful to health'. It is commonly used in warnings and product labels.
This product contains substances hazardous to health.
Means 'toxic' or 'poisonous', emphasizing the presence of poison. Used for chemicals, plants, etc.
Be careful of hazardous mushrooms.
Describing weather, road conditions, or environmental situations that are dangerous.
Used metaphorically to describe a plan, investment, or action that is risky.
荒天のため、飛行機が欠航になった。
Flights were canceled due to hazardous weather.