Meaning
The kanji 胸 (mune) is a core character in Japanese, primarily referring to the 'chest,' 'breast,' or 'bosom.' Beyond its physical meaning, it also metaphorically represents the 'heart' or 'feelings,' serving as the seat of emotions and innermost thoughts. This allows 胸 to describe both a tangible body part and an abstract inner state, making it a versatile and deeply integrated character in the language.
Etymologically, 胸 is a phono-semantic compound. Its left-hand radical is 月 (niku-zuki), an altered form of 肉 (niku), meaning 'flesh' or 'meat.' When 月 appears on the left side of a kanji, it almost always indicates a connection to a body part. This component immediately links 胸 to the physical realm of human anatomy. The right-hand component is 匈 (kyō), which originally meant 'chest' or 'bosom' and also provides the phonetic reading for 胸. Thus, the kanji visually combines 'flesh' (月) with the concept and sound of 'chest' (匈) to form its meaning. The visual shape clearly reflects its origins, associating the body's flesh with the chest area.
胸 has 10 strokes and is a Jōyō kanji, part of the standardized set of characters taught in Japanese schools. It is typically introduced in Grade 6 of elementary school, highlighting its importance and frequent use in everyday Japanese.
Readings
On'yomi (音読み) — Chinese-derived readings
The on'yomi, or Chinese-derived reading, for 胸 is キョウ (kyō). This reading often appears in compound words, especially in more formal, academic, or medical contexts. It usually retains a sense of the physical chest but can also extend to more abstract or internal conditions, reflecting its usage in Chinese.
- 胸囲 (kyōi) — chest circumference. This term is often found in health, sports, and clothing measurements, indicating the measurement around the chest. For example, a tailor might ask for your 胸囲 when making a suit.
- 胸中 (kyōchū) — in one's heart/mind; innermost feelings. This compound emphasizes the abstract aspect of 胸, referring to a person's private thoughts, feelings, or intentions. It's often used in reflective or literary contexts, such as describing a poet's 胸中.
- 胸腺 (kyōsen) — thymus gland. This specific medical term refers to a lymphoid organ located in the chest, crucial for the immune system. It perfectly illustrates the scientific and anatomical usage of the on'yomi reading.
Kun'yomi (訓読み) — Native Japanese readings
The kun'yomi, or native Japanese readings, for 胸 are むね (mune) and むな
- (muna-).
The reading むね (mune) is the most common and versatile. It is used both as a standalone word and in numerous idiomatic expressions. It can refer to the physical chest or breast, but very often, it denotes one's feelings, spirit, or heart, especially in emotional contexts. This reading is fundamental to many everyday Japanese phrases and expressions.
- 胸 (mune) — chest; breast; bosom. This is the basic standalone use of the kanji, referring directly to a physical body part. For example, you might say 胸が痛い (mune ga itai) to mean 'my chest hurts.'
- 胸を張る (mune o haru) — to puff out one's chest; to be proud or confident. This idiom vividly describes a physical posture that conveys a strong sense of pride or self-assurance, like a winner accepting an award.
- 胸騒ぎ (munasawagi) — uneasy feeling; premonition; apprehension. Here, むね combines with 騒ぎ (sawagi - commotion) to describe an internal disturbance or a sense of foreboding in one's heart or mind. For instance, 嫌な胸騒ぎがする (iya na munasawagi ga suru) means 'I have a bad feeling.'
The reading むな
(muna-) is less common and typically appears as a prefix in specific compound words. It usually refers to something associated with or located at the chest or bosom, often forming part of a noun.
胸元 (munamoto) — the bust; bosom; the front of the chest. This term refers specifically to the upper front part of the body, often in relation to clothing or adornments. You might describe someone wearing a necklace around their 胸元.
胸板 (munaita) — chest (as a flat board); strong chest. This compound describes a broad or sturdy chest, sometimes implying physical strength, like a swimmer's 胸板.
胸飾り (munakazari) — brooch; chest ornament. This refers to an accessory worn on the chest, further illustrating the use of むな
as a prefix for objects related to the chest area, such as a corsage.
Common Words & Compounds
The kanji 胸 appears in a wide array of words and expressions, reflecting its importance in describing both the physical body and the complex world of human emotions. Exploring these compounds offers deeper insight into its usage.
Physical Body & Medical Terms
Many compounds using 胸 directly relate to the anatomical chest or associated medical conditions. These terms often use the on'yomi reading キョウ.
- 胸部 (kyōbu) — chest region. This is a general anatomical term for the entire area of the chest, often used in medical diagnoses.
- 胸骨 (kyōkotsu) — sternum; breastbone. This specifies the bone located in the center of the chest.
- 胸水 (kyōsui) — pleural effusion; fluid in the chest cavity. A medical term describing an accumulation of fluid around the lungs.
- 胸郭 (kyōkaku) — ribcage; thoracic cage. The bony structure that encloses and protects the chest cavity.
- 胸肉 (muneniku) — breast meat (e.g., chicken breast). This uses the kun'yomi and refers to the fleshy part of the breast in poultry, a common food item.
Feelings & Emotions
Perhaps even more frequently, 胸 conveys a wide range of feelings, reflecting the idea of the heart as the center of emotion. These expressions typically use the kun'yomi むね.
- 胸中 (kyōchū) — in one's heart/mind; innermost feelings. This is often used when someone expresses deep, personal thoughts or sentiments, such as to share one's 胸中.
- 胸襟 (kyōkin) — openheartedness; one's mind or heart. It's commonly used in phrases like 胸襟を開く (kyōkin o hiraku), meaning to open one's heart to someone and speak frankly.
- 胸が痛む (mune ga itamu) — to feel a pang of sympathy or sorrow; to feel heartache. This expresses deep emotional pain or empathy, for example, upon hearing sad news.
- 胸騒ぎ (munasawagi) — uneasy feeling; premonition. This describes a persistent sense of unease or impending trouble, like a gut feeling that something is wrong.
- 胸を躍らせる (mune o odoraseru) — to feel one's heart beat with excitement; to be thrilled. This describes a feeling of eager anticipation or joy, such as before a long-awaited trip.
Actions & Expressions
胸 also features prominently in various action-oriented phrases and idiomatic expressions that describe human behavior or conditions.
- 胸に手を当てる (mune ni te o ateru) — to reflect honestly; to search one's heart. This implies a moment of introspection and sincerity, often before making a decision.
- 胸を打つ (mune o utsu) — to move one's heart; to impress deeply. This is used when something evokes strong emotions, like a touching story or a powerful performance.
- 胸に刻む (mune ni kizamu) — to engrave in one's heart/mind; to bear in mind. This means to remember something significant forever, such as an important lesson.
- 胸焼け (muneyake) — heartburn; acid reflux. This describes a common physical discomfort felt in the chest area, distinct from emotional pain.
Example Sentences
彼女は希望に胸を膨らませていた。
Kanojo wa kibō ni mune o fukuramasete ita.
She was filled with hope.
医者は胸に聴診器を当てた。
Isha wa mune ni chōshinki o ateta.
The doctor placed a stethoscope on his chest.
その感動的な話は私の胸を打った。
Sono kandōteki na hanashi wa watashi no mune o utta.
That moving story touched my heart.
彼は自信に満ちて胸を張っていた。
Kare wa jishin ni michite mune o hatte ita.
He puffed out his chest, full of confidence.
大事なことは常に胸に刻んでおくべきだ。
Daiji na koto wa tsune ni mune ni kizande oku beki da.
Important things should always be engraved in your heart.
試合の前はいつも胸騒ぎがする。
Shiai no mae wa itsumo munasawagi ga suru.
I always get an uneasy feeling before a match.
彼女は胸元にきれいな飾りをしていた。
Kanojo wa munamoto ni kirei na kazari o shite ita.
She had a beautiful ornament on her bosom.
長距離走の後、彼の胸は激しく上下した。
Chōkyorisō no ato, kare no mune wa hageshiku jōge shita.
After the long-distance run, his chest heaved violently.
胸中を明かしてくれたことに感謝します。
Kyōchū o akashite kureta koto ni kansha shimasu.
I appreciate you revealing your true feelings to me.
風邪の時は胸が苦しくなることがある。
Kaze no toki wa mune ga kurushiku naru koto ga aru.
Sometimes when I have a cold, my chest feels tight.
Memory Tip
To remember the kanji 胸 (mune), focus on its two main components. The left side is 月 (niku-zuki), which represents 'flesh' or a 'body part' when it appears as a radical on the left. This immediately tells you the kanji relates to the physical body. The right side is 匈 (kyō), which historically meant 'chest' and also provides the on'yomi reading. You can visualize 匈 as a 'box' (口) for your 'heart' or 'lungs' inside your body (勹). Combine the idea of a 'fleshy body part' (月) with the 'chest' (匈), the area where your vital organs and emotions reside. Imagine a doctor placing a stethoscope on the 'flesh' of your 'chest' to listen to your 'heart' (mune).