危 険(きけん)

きけん

na-adjective, noun

dangerous, danger

descriptive evaluation abstract

See also: 棄権(きけん) (abstention, withdrawal)

1. dangerous, risky

Involving or exposing to risk or harm.

ここは危険(きけん)です。

It's dangerous here.

危険(きけん)な場所(ばしょ)には行(い)かないでください。

Please don't go to dangerous places.

危険な + noun

この道(みち)は夜(よる)になると危険(きけん)なので、気(き)をつけてください。

This road becomes dangerous at night, so please be careful.

危険(きけん)な運転(うんてん)はやめてください。

Please stop driving dangerously.

危険(きけん)な動物(どうぶつ)がいる。

There are dangerous animals here.

2. danger, risk (noun)

The possibility of suffering harm or injury.

危険(きけん)を感(かん)じた。

I sensed danger.

Used as a noun

命(いのち)の危険(きけん)を冒(おか)してまで助(たす)けに行(い)った彼(かれ)は本当(ほんとう)に勇敢(ゆうかん)だ。

He was truly brave to go help despite risking his life.

危険(きけん)を冒(おか)す価値(かち)がある。

It's worth the risk.

危険(きけん)から逃(に)げた。

I escaped from danger.

危険(きけん)に気(き)づかなかった。

I didn't notice the danger.

危険(きけん) works both as a na-adjective and as a noun.

As a na-adjective

危険(きけん)な場所(ばしょ): a dangerous place (before a noun)
危険(きけん)だ/です: it is dangerous (predicate)
危険(きけん)になる: to become dangerous

As a noun

危険(きけん)がある: there is a danger
危険(きけん)を感(かん)じる: to sense danger
危険(きけん)を避(さ)ける: to avoid danger

Register: More formal and written than 危(あぶ)ない. Signs, warnings, and official notices use 危険(きけん)；everyday spoken warnings use 危(あぶ)ない. The bare sign 危険(きけん)！means 'Danger!'

Similar words

危(あぶ)ない: dangerous (plain, spoken; also 'Look out!')
危険性(きけんせい): riskiness, the degree of danger (abstract noun)
リスク: risk (loanword; business and statistical contexts)
危機(きき): crisis (a critical situation, not a hazard)
安全(あんぜん): safe, safety

Related Words

Antonym: 安全(あんぜん) (safe)

Related: 危(あぶ)ない (dangerous (plain, spoken))

Related: 危険性(きけんせい) (riskiness, degree of danger)

Related: リスク (risk (loanword))

Compare: 危機(きき) (crisis)

Compare: 有害(ゆうがい) (harmful, noxious, toxic)

Compare: 脅威(きょうい) (threat)

Compare: リスキー (risky)

core

Added 2026.1.7 21:39 · Revised 2026.9.4 21:31

01000/01141_kiken