Meaning
The kanji 齢 (れい, よわい) primarily means 'age,' 'years,' or 'lifespan.' It represents the duration of existence for people, animals, or even objects. While often used in formal contexts or specific compounds, 齢 evokes the passage of time and its effects on living beings or things.
The visual shape of 齢 provides insight into its origins as a semantic-phonetic compound. The left component is 歯 (は), meaning 'tooth.' This is significant because teeth are a clear indicator of age in many animals, including humans. They develop, wear down, and are eventually lost, marking different stages of life. Thus, the 'tooth' radical clearly conveys the 'age' aspect of the kanji.
On the right side, we find 令 (れい). It serves as the phonetic component, indicating the 'rei' sound, and also carries meanings like 'command' or 'order.' Together, the 'tooth' radical provides the core meaning, while 令 provides the pronunciation, effectively combining both sense and sound to represent 'age.'
The kanji 齢 consists of 17 strokes; its somewhat complex structure is due to the detailed 'tooth' radical. It is categorized as a Jōyō kanji (常用漢字), meaning it's part of the 2,136 characters designated for common use in Japan. While not typically taught in elementary school (grades 1-6), it is part of the secondary school curriculum (often informally referred to as Grade 8 for pedagogical purposes). This makes it essential for intermediate Japanese learners and those preparing for the JLPT N3 level.
Readings
On'yomi (音読み) — Chinese-derived readings
The On'yomi, or Chinese-derived reading, for 齢 is レイ (REI). This is the most common reading in modern Japanese, especially when 齢 appears in compound words. You'll find it in many contexts related to age, often with a more formal or administrative nuance.
- 年齢 (nenrei) — This is the most common word for 'age' in general, referring to a person's chronological years. For example, 年齢を確認する (nenrei wo kakunin suru) means 'to confirm one's age.'
- 高年齢 (kounenrei) — Refers to 'advanced age' or 'old age.' This term is often used in official contexts or discussions about demographics, such as 高年齢者 (kounenreisha) for 'elderly people.'
- 樹齢 (jurei) — Specifically means the 'age of a tree.' For instance,この木は樹齢百年だ (kono ki wa jurei hyakunen da) means 'This tree is 100 years old.'
- 船齢 (senrei) — Refers to the 'age of a ship.' This term is used in the maritime industry to describe how old a vessel is.
Kun'yomi (訓読み) — Native Japanese readings
The Kun'yomi, or native Japanese reading, for 齢 is よわい (yowai). This reading is much less common in contemporary spoken Japanese compared to its On'yomi counterpart. When encountered, it often carries a more literary, archaic, or poetic nuance, particularly when referring to a person's age. It emphasizes the concept of years accumulated, giving it a more introspective feel.
- 齢 (yowai) — In isolation or in literary contexts, it can directly mean 'age' or 'years of age.' It's not typically used in casual conversation to ask someone's age.
- 齢を重ねる (yowai wo kasaneru) — This phrase means 'to grow older' or 'to accumulate years.' It implies a gradual and dignified passage of time and aging, often used in reflective or respectful contexts. For example, 齢を重ねるごとに賢くなる (yowai wo kasaneru goto ni kashikoku naru) means 'to grow wiser with age.'
- 齢を取る (yowai wo toru) — Another expression meaning 'to grow old' or 'to age.' While synonymous with 年を取る (toshi wo toru), it carries a more formal or traditional tone.
Common Words & Compounds
The kanji 齢 is key to discussing various aspects of age, not only for people but also for inanimate objects. Understanding these compounds will help you comprehend and express nuances related to time and duration in Japanese.
- General Age & Human Life:
- 年齢 (nenrei) — age, years. This is the standard term used across many situations, from official documents to everyday conversation.
- 実年齢 (jitsunenrei) — actual age, chronological age. Often contrasted with mental or perceived age.
- 精神年齢 (seishin nenrei) — mental age. Used to describe one's psychological maturity relative to their chronological age.
- 高齢者 (koureisha) — elderly person, senior citizen. A widely used term in social and demographic discussions.
- 平均年齢 (heikin nenrei) — average age. Used in statistics and demographics.
- 定年年齢 (teinen nenrei) — retirement age. The age at which one is expected or allowed to retire.
- Object & Biological Age:
- 樹齢 (jurei) — age of a tree. Crucial for understanding ancient forests or individual specimen trees.
- 船齢 (senrei) — age of a ship. Important in maritime regulations and appraisal.
- 車齢 (sharei) — age of a vehicle. Used in discussing car maintenance, resale value, or environmental impact.
- 魚齢 (gyorei) — age of a fish. Used in marine biology and fisheries management.
- Literary & Expressive Usage:
- 若齢 (jakurei) — young age. A more formal or technical term than just 'young.'
- 齢を重ねる (yowai wo kasaneru) — to grow older, to accumulate years. A graceful and introspective way to describe aging.
- 初老の齢 (shorou no yowai) — age of early old age. A descriptive phrase often found in literature.
Example Sentences
彼女の年齢は私と同じです。
Kanojo no nenrei wa watashi to onaji desu.
Her age is the same as mine.
年齢を聞くのは失礼な場合もあります。
Nenrei wo kiku no wa shitsurei na baai mo arimasu.
Asking someone's age can sometimes be rude.
彼はまだ若い年齢なのに、会社のリーダーです。
Kare wa mada wakai nenrei na no ni, kaisha no riidaa desu.
Even though he is still young, he is a leader in the company.
この古木の樹齢は千年を超えています。
Kono koboku no jurei wa sennen wo koete imasu.
This ancient tree's age exceeds a thousand years.
日本では高齢者の人口が増えています。
Nihon de wa koureisha no jinkou ga fuete imasu.
In Japan, the elderly population is increasing.
年齢によって健康に気を付けるポイントが異なります。
Nenrei ni yotte kenkou ni ki wo tsukeru pointo ga kotonarimasu.
The health points to be mindful of differ by age.
母は齢を重ねても、美しさを保っています。
Haha wa yowai wo kasanete mo, utsukushisa wo tamotte imasu.
Even as my mother grows older, she maintains her beauty.
高年齢でも新しいことに挑戦する人は多いです。
Kounenrei de mo atarashii koto ni chousen suru hito wa ooi desu.
Many people challenge themselves with new things even at an advanced age.
彼女は実年齢よりも若く見られます。
Kanojo wa jitsunenrei yori mo wakaku miraremasu.
She looks younger than her actual age.
Memory Tip
To remember 齢, focus on its two components. The left component is 歯 (は), meaning 'tooth.' Think about how the condition of teeth often indicates a person's age: from baby teeth to adult teeth, wisdom teeth, or even their loss in old age. They are clear markers of the passage of time. The right component is 令 (レイ). It provides the 'rei' sound for the On'yomi and also means 'command' or 'order.' Imagine time 'commanding' or 'ordering' your teeth to change as you 'age.' So, when you see the 'tooth' radical alongside the 'command' phonetic, you'll remember it's all about how time 'commands' your teeth to reflect your 'age.'