The kanji 背 is an essential character for JLPT N2 learners and anyone looking to deepen their understanding of Japanese. Its meaning is multifaceted, encompassing concepts related to the human body, physical measurements, and even the metaphorical act of turning away or opposing something. You'll encounter 背 frequently in everyday Japanese, making it a crucial character to master for advanced communication.
Meaning
The kanji 背 (せ、はい) primarily conveys the meaning of the 'back' of the body—the side opposite the front. From this core meaning, it extends to 'stature' or 'height' when referring to a person's physical dimension. Metaphorically, 背 can mean 'to turn one's back on,' implying disobedience, betrayal, or opposition. When encountering 背, try to determine from context if it refers to a physical 'back,' a measurement of 'height,' or an action of 'turning away.'
Tracing its origins, 背 is a fascinating character. While not a simple pictograph, its form strongly suggests its meaning. The left component, 月, is a variant of 肉 (にくづき), the 'meat' or 'flesh' radical. This radical commonly appears in kanji related to body parts (e.g., 肝, 腕, 胃). The right component, 北, is often associated with 'north,' but in its ancient form, it depicted two people standing back-to-back. This visual association with 'back-to-back' or 'the reverse side' strongly reinforces 背's primary meaning. Thus, the kanji visually combines the idea of 'body' with 'turning away' or 'the rear side.'
This etymological connection helps us understand how a single kanji can encompass such a range of related meanings. It provides a visual and conceptual anchor, linking the back of the body, the height extending upwards, and the act of turning one's back. This kanji has 9 strokes and is taught in the 6th grade of Japanese elementary school. Therefore, it's a familiar sight for native speakers long before they reach advanced JLPT levels.
Readings
The kanji 背 features both On'yomi (Chinese-derived readings) and multiple Kun'yomi (native Japanese readings), each used in distinct contexts. To achieve fluent comprehension, it's essential to master these readings and their proper usage.
On'yomi (音読み) — Chinese-derived readings
The primary On'yomi for 背 is ハイ (hai). This reading is typically found in compound words (熟語 - jukugo) where 背 is combined with other kanji, often retaining a sense of 'back,' 'behind,' or 'opposition.' It can also appear in words related to the background or the inverse.
背景 (haikei) — background, scenery. This refers to the scenery or circumstances behind an event or a picture.
背後 (haigo) — behind one's back, in the rear. Often used to describe a position literally behind someone, or figuratively, behind the scenes.
背反 (haihan) — opposition, rebellion, defiance. This compound highlights the meaning of 'turning one's back against' an idea, person, or rule.
Kun'yomi (訓読み) — Native Japanese readings
背 has several important Kun'yomi readings, each with slightly different nuances and applications. These are often used when the kanji stands alone, or in compounds with okurigana (送り仮名) – the trailing hiragana that complete the word.
せ (se): This is perhaps the most common kun'yomi, used when referring to the 'back' of the body or an object, and very frequently for 'height' or 'stature.'
背中 (senaka) — the back (of one's body). This is the most direct way to say 'back' in Japanese.
背が高い (se ga takai) — tall (literally, 'one's height is high'). This is the standard expression for being tall.
背丈 (setake) — stature, height. Refers specifically to the height of a person or animal.
せい (sei): While less common as a standalone, this reading also relates to 'height' and appears in some specific compounds or phrases, often with a slightly more formal or comparative nuance than 'se'.
背くらべ (seikurabe) — comparing heights. A common children's game or activity.
背を伸ばす (sei wo nobasu) — to stretch one's back, to grow taller.
そむ-く (somuku): This is an intransitive verb meaning 'to turn one's back on,' 'to disobey,' or 'to betray.' It describes an action where someone goes against expectations, rules, or loyalty.
約束に背く (yakusoku ni somuku) — to break a promise.
親に背く (oya ni somuku) — to disobey one's parents.
そむ-ける (somukeru): This is a transitive verb, meaning 'to turn (something/someone's back) away.' It implies actively directing something or someone to face away.
顔を背ける (kao wo somukeru) — to turn one's face away.
彼に背けて座る (kare ni somukete suwaru) — to sit with one's back to him.
Common Words & Compounds
背 is a versatile kanji, forming a wide range of compound words. The examples below illustrate its core meanings related to the body, height, and actions of turning or opposing. Mastering these compounds is a great way to significantly expand your Japanese vocabulary.
Body Parts & Position:
- 背中 (senaka) — The back of the body.
例: 彼は背中が広い。 (Kare wa senaka ga hiroi.) — He has a broad back.
- 背骨 (sebone) — Backbone, spine.
例: 猫は背骨が柔らかい。 (Neko wa sebone ga yawarakai.) — Cats have flexible spines.
- 背後 (haigo) — Behind, the rear.
例: 私の背後に誰かいる。 (Watashi no haigo ni dareka iru.) — There's someone behind me.
- 背表紙 (sebyōshi) — The spine of a book.
例: この本の背表紙は赤い。 (Kono hon no sebyōshi wa akai.) — The spine of this book is red.
- 背筋 (sesuji) — The line of the back, the spine.
例: 背筋を伸ばして座りなさい。 (Sesuji wo nobashite suwarinasai.) — Sit up straight.
Height & Stature:
- 身長 (shinchō) — (One's) height. Often used for a specific numerical measurement of height.
例: 彼の身長は180cmです。 (Kare no shinchō wa hyakuhachijussenchi desu.) — His height is 180cm.
- 背丈 (setake) — Height, stature. Used similarly to 身長 but can also refer to the height of plants or objects.
例: その木は私の背丈より高い。 (Sono ki wa watashi no setake yori takai.) — That tree is taller than I am.
- 背が高い (se ga takai) — Tall (adjectival phrase).
例: 彼女は背が高くてモデルみたいだ。 (Kanojo wa se ga takakute moderu mitai da.) — She's tall and looks like a model.
Actions & Metaphors:
- 背く (somuku) — To turn one's back on, disobey, betray.
例: 命令に背くことはできない。 (Meirei ni somuku koto wa dekinai.) — I cannot disobey orders.
- 背ける (somukeru) — To turn away (transitive).
例: 彼女は彼に顔を背けた。 (Kanojo wa kare ni kao wo somuketa.) — She turned her face away from him.
- 背景 (haikei) — Background (e.g., of a picture, a story).
例: その事件の背景には深い問題がある。 (Sono jiken no haikei ni wa fukai mondai ga aru.) — There are deep problems in the background of that incident.
- 背広 (sebiro) — Business suit. This word is said to have originated from 'Savile Row' in London, where such suits were tailored.
例: 彼はいつも背広を着ている。 (Kare wa itsumo sebiro wo kiteiru.) — He always wears a business suit.
Example Sentences
Observe how 背 is used in various contexts in these everyday Japanese sentences, demonstrating its range of meanings from physical attributes to abstract actions.
夏は背中に汗をかきやすいです。
Natsu wa senaka ni ase wo kaki yasui desu.
In summer, it's easy to sweat on your back.
私の兄は背が高くて、スポーツが得意です。
Watashi no ani wa se ga takakute, supōtsu ga tokui desu.
My elder brother is tall and good at sports.
彼は両親の期待に背いて、自由に生きることを選んだ。
Kare wa ryōshin no kitai ni somuite, jiyū ni ikiru koto wo eranda.
He went against his parents' expectations and chose to live freely.
彼女は私の質問に答えず、顔を背けました。
Kanojo wa watashi no shitsumon ni kotaezu, kao wo somukemashita.
She didn't answer my question and turned her face away.
警察は容疑者の背後を追跡していた。
Keisatsu wa yōgisha no haigo wo tsuiseki shiteita.
The police were tracking the suspect from behind.
この絵の背景には、美しい山々が描かれています。
Kono e no haikei ni wa, utsukushii yamayama ga egakareteimasu.
Beautiful mountains are depicted in the background of this painting.
健康のためには、背筋を正しく保つことが大切です。
Kenkō no tame ni wa, sesuji wo tadashiku tamotsu koto ga taisetsu desu.
To stay healthy, it's important to keep your back straight.
彼は毎朝背を伸ばすストレッチをしています。
Kare wa maiasa sei wo nobasu sutorecchi wo shiteimasu.
He does stretches to lengthen his back every morning.
会議で、彼は多数の意見に背き、自分の考えを主張した。
Kaigi de, kare wa tasū no iken ni somuki, jibun no kangae wo shuchō shita.
In the meeting, he went against the majority opinion and asserted his own idea.
Memory Tip
To remember 背, focus on its components: The left part, 月 (niku-zuki), is the 'flesh' or 'body part' radical. The right part, 北 (kita), while now meaning 'north,' originally depicted two people standing back-to-back. Picture a 'body part' (月) from two people standing 'back-to-back' (北). This visually ties the kanji to the 'back' of a person, and metaphorically, to the act of 'turning one's back' or 'disobeying.'