危険性（きけんせい、kikensei）
- dangerousness

The Japanese word 危険性 (きけんせい) means "risk," "danger," "potential danger," or "probability of danger." It refers to the possibility of something harmful or negative happening. It emphasizes the *potential* for something bad to occur, rather than the certainty of it. This word is often used in situations where there is a degree of uncertainty about the outcome. It is a noun.

⚫︎ 地震の危険性 Translation: The risk of an earthquake ⚫︎ 健康への危険性を考慮する Translation: To consider the risk to one's health ⚫︎ この薬には副作用の危険性がある Translation: This medicine has the potential for side effects.

危険性 is used in formal and informal contexts. You can use it when discussing potential hazards, negative possibilities, or vulnerabilities. It's often used when assessing situations, making decisions, or reporting on potential problems. It can be used in various fields, including science, medicine, finance, and everyday life. The word is used to describe the *potential* for something negative to occur, not the certainty of it.

危険性 is typically written in kanji and hiragana: 危険性. The kanji 危険 (きけん) means "danger" or "risk". The suffix 性 (せい) is a suffix that forms nouns and indicates "quality," "characteristic," or "property." There are no other common ways to write this word. The okurigana (hiragana attached to the kanji) is fixed as 性.

⚫︎ リスク (risuku): "risk" (loanword) ⚫︎ 危なさ (あぶなさ): "danger," "peril" ⚫︎ 可能性 (かのうせい): "possibility," can sometimes be used when discussing negative possibilities. ⚫︎ 危険度 (きけんど): "degree of danger"

⚫︎ 安全 (あんぜん): "safety" ⚫︎ 無害 (むがい): "harmlessness" ⚫︎ 安心 (あんしん): "peace of mind," "relief"

このプロジェクトには、失敗する危険性が少しあります。 ・Translation: There is a slight risk of failure for this project. ・Explanation: This sentence illustrates the use of 危険性 to describe a potential negative outcome (failure) of a project.

その場所は、洪水になる危険性があります。 ・Translation: That place is at risk of flooding. ・Explanation: This sentence highlights the use of 危険性 in a context related to natural disasters. It describes a situation where there is a chance of flooding.

The word 危険性 is formed by combining the kanji 危険 (きけん), meaning "danger," with the suffix 性 (せい), which creates a noun meaning "quality" or "characteristic." Therefore, the origin of 危険性 is directly tied to the concept of the "quality of danger" or the "characteristic of being risky."