生存率（せいぞんりつ、seizonritsu）
- survival rate

The Japanese word 生存率, read as せいぞんりつ, translates to "survival rate" or "survival probability" in English. It refers to the percentage of a population (of organisms, patients, items, etc.) that survives for a specific period or under specific conditions. This rate is usually expressed as a percentage. It's a crucial metric used in various fields to assess the likelihood of something lasting or succeeding. It's often used in medical, ecological, and engineering contexts. It quantifies the proportion of entities that continue to exist after a given time or event.

⚫︎がんの生存率 Translation: Cancer survival rate ⚫︎5年生存率 Translation: 5-year survival rate ⚫︎プロジェクトの生存率 Translation: Project survival rate

You use 生存率 in situations where you want to discuss the chances of something surviving. It's frequently used in discussions about: ⚫︎ Medical treatments (patient survival) ⚫︎ Wildlife populations (species survival) ⚫︎ Product lifecycles (product survival) ⚫︎ Project completion (project survival). You can use it in formal reports, scientific articles, or everyday conversations. You can often attach a time frame (e.g., "5-year survival rate") or specific conditions (e.g., "survival rate with treatment").

生存率 is typically written with the kanji 生存 (meaning "survival" or "existence") followed by the kanji 率 (meaning "rate" or "percentage"). The reading is せいぞんりつ. There are no other common ways to write this word. The okurigana is standard, with no variations.

⚫︎ 生存確率 (せいぞんかくりつ) - Survival probability ⚫︎ 生存割合 (せいぞんわりあい) - Survival ratio (less common) ⚫︎ 生存可能性 (せいぞんかのうせい) - Possibility of survival

There aren't direct antonyms for 生存率 itself, but you can think of related concepts. Some opposite ideas include: ⚫︎ 死亡率 (しぼうりつ) - Mortality rate (rate of death) ⚫︎ 絶滅率 (ぜつめつりつ) - Extinction rate ⚫︎ 失敗率 (しっぱいりつ) - Failure rate

この治療法を受けた患者の5年生存率は80%です。 ・Translation: The five-year survival rate for patients who received this treatment is 80%. ・Explanation: This sentence describes the probability of patients surviving for five years after undergoing a specific treatment.

新種の魚の生存率は、生息地の環境によって大きく変わる。 ・Translation: The survival rate of the new fish species greatly changes depending on the environment of their habitat. ・Explanation: This sentence highlights how environmental factors influence the survival of a species.

The word 生存率 is composed of two kanji. 生存 itself comes from the verbs 生きる (to live) and 残る (to remain), giving the meaning of "to stay alive." The second kanji, 率, means "rate" or "ratio." Therefore, the origin of this word is straightforward: it's a combination representing the rate at which something survives.