Meaning
The kanji 壊 (kai, kowa-su, kowa-reru) represents the core concepts of "breaking," "destroying," or "damaging." It describes actions that render something unusable, cause it to fall apart, or lead to its ruin. You'll frequently encounter this kanji in both physical and abstract contexts. Physically, it describes a machine breaking down or a building collapsing. More abstractly, it can refer to the destruction of peace or the breakdown of a system.
Its visual form offers compelling insight into its meaning. The left-hand radical, 土 (tsuchi-hen), means "earth" or "soil," immediately grounding the kanji in physical, tangible realities. The right-hand component is 裏 (ura), meaning "inside," "back," or "reverse." While 裏 has its own complex etymology related to clothing and villages, in 壊, it conveys a sense of something being hollowed out, falling apart from within, or collapsing to its core. Picture the earth (土) giving way or crumbling from its very foundations (裏), leading to complete destruction. This combination vividly illustrates the concept of something being fundamentally undone or brought to ruin.
With 16 strokes, 壊 is a Jouyou Kanji (常用漢字) taught in secondary school. Its prominence underscores its importance for expressing various forms of destruction and damage in Japanese.
Readings
On'yomi (音読み) — Chinese-derived readings
The On'yomi of 壊 comes from its historical Chinese pronunciation and is primarily used in compound words.
**カイ (kai)**: This is the most common On'yomi. You'll find it in a wide array of compound words related to destruction, collapse, and damage, making it crucial for understanding advanced vocabulary.破壊 (hakai) — destruction, demolition, sabotage. This word suggests a forceful, often intentional, act of taking something apart or ruining it.
崩壊 (hōkai) — collapse, breakdown, disintegration. It's frequently used for structures, systems, organizations, or even societies falling apart due to internal or external pressures.
壊滅 (kaimetsu) — annihilation, total destruction, devastation. Implies complete and utter obliteration, leaving nothing in its wake.
損壊 (sonkai) — damage, injury (especially to property). This term often refers to physical harm done to objects or buildings.
Kun'yomi (訓読み) — Native Japanese readings
Kun'yomi readings are native Japanese words that convey the kanji's meaning. They are typically used when the kanji forms a standalone verb or adjective, often accompanied by okurigana (送り仮名).
**こわ-す (kowa-su)**: This transitive verb means "to break," "to destroy," or "to damage" something. It always takes a direct object and implies an agent performing the action, whether intentionally or accidentally.物を壊す (mono wo kowasu) — to break something (an object), like a toy or a plate.
記録を壊す (kiroku wo kowasu) — to break a record (e.g., in sports), used figuratively.
友情を壊す (yūjō wo kowasu) — to break a friendship, meaning to damage or ruin a relationship.
**こわ-れる (kowa-reru)**: This intransitive verb means "to break," "to be destroyed," or "to become damaged." It describes something breaking or falling apart, either on its own or due to external forces, without focusing on the agent. Essentially, it indicates a change of state.機械が壊れる (kikai ga kowareru) — a machine breaks down, becomes broken or malfunctions.
関係が壊れる (kankei ga kowareru) — a relationship breaks down or falls apart.
建物が壊れる (tatemono ga kowareru) — a building collapses or is damaged, often due to a natural disaster.
Common Words & Compounds
The kanji 壊 forms many essential Japanese words, covering various aspects of damage and destruction across different contexts. Below are key examples, grouped by nuance or context to aid your understanding:
General Destruction & Demolition:
破壊 (hakai) — destruction, demolition, sabotage. Often implies intentional or forceful destruction.
崩壊 (hōkai) — collapse, breakdown, disintegration. Frequently used for systems, structures, or societies.
壊滅 (kaimetsu) — annihilation, total destruction, devastation. Suggests complete obliteration.
Damage & Malfunction:
損壊 (sonkai) — damage, injury (especially to property or objects), often used in official reports or legal contexts.
破損 (hason) — damage, breakage (often refers to physical objects like goods or equipment that are broken or cracked).
倒壊 (tōkai) — collapse (specifically of a building or structure collapsing due to external force or structural weakness).
Medical & Biological Contexts:
壊死 (eshi) — necrosis, tissue death. A medical term for the death of cells in living tissue.
壊血病 (kaiketsubyō) — scurvy (literally "broken blood disease"), a disease caused by vitamin C deficiency.
細胞を壊す (saibō wo kowasu) — to destroy cells, a common phrase in biology, such as 'to destroy cancer cells'.
Self-Destruction:
自壊 (jikai) — self-destruction, auto-destruction. Refers to something destroying itself or possessing an inherent tendency to break down.
Figurative Usage:
関係を壊す (kankei wo kowasu) — to damage/break a relationship, referring to abstract bonds.
幻想を壊す (gensō wo kowasu) — to shatter an illusion or fantasy, such as '現実が幻想を壊す' (genjitsu ga gensō wo kowasu - reality shatters the illusion).
Example Sentences
古いラジオが突然壊れてしまった。
Furui rajio ga totsuzen kowarete shimatta.
The old radio suddenly broke down.
その地震で多くの建物が壊れた。
Sono jishin de ōku no tatemono ga kowareta.
Many buildings were damaged in that earthquake.
子供が遊びながらおもちゃを壊してしまった。
Kodomo ga asobinagara omocha wo kowashite shimatta.
The child accidentally broke the toy while playing.
環境破壊は深刻な問題だ。
Kankyō hakai wa shinkoku na mondai da.
Environmental destruction is a serious problem.
彼の発言がチームの団結を壊しかねない。
Kare no hatsugen ga chīmu no danketsu wo kowashikanenai.
His remarks could potentially break the team's unity.
データが破損して、コンピューターが壊れたように動かなくなった。
Dēta ga hason shite, konpyūtā ga kowareta yō ni ugokanaku natta.
The data was corrupted, and the computer stopped working as if it were broken.
経済の崩壊は社会全体に大きな影響を与えた。
Keizai no hōkai wa shakai zentai ni ōkina eikyō wo ataeta.
The collapse of the economy had a major impact on society as a whole.
この古い城壁は自然の力によってゆっくりと壊されつつある。
Kono furui jōheki wa shizen no chikara ni yotte yukkuri to kowasaretsutsu aru.
This old castle wall is slowly being destroyed by the forces of nature.
この工場の機械は古く、いつ壊れてもおかしくない状態だ。
Kono kōjō no kikai wa furuku, itsu kowaretemo okashikunai jōtai da.
The machinery in this factory is old and could break down at any moment.
Memory Tip
To remember 壊, focus on its two main components: 土 (earth/soil) on the left, and 裏 (inside/back) on the right. Picture the earth breaking or collapsing from the inside. Envision a sinkhole forming, or a cavern beneath the surface giving way, causing the ground above to crumble and break. The "earth" (土) is quite literally being "broken from within" (裏). This vivid image of internal destruction or fundamental damage to solid ground can help you cement the meaning of "break," "destroy," or "damage" for 壊. This image perfectly captures the essence of something being rendered dysfunctional or ruined from its core.