密
Character Story & Explanation
Historically, 密 was indeed the name of an ancient state during the Western Zhou dynasty (c. 1046–771 BCE), located in present-day Henan Province — recorded in bronze inscriptions and the *Zuo Zhuan*. Today, it’s overwhelmingly used in modern compounds: 密码 (mìmǎ, 'password'), 保密 (bǎomì, 'to keep confidential'), and 密度 (mìdù, 'density'). The idiom 严丝合缝 (yán sī hé fèng, 'not a single gap') reflects 密’s core sense of tightness.
The character’s form evolved from seal script: the top 宀 represents a roof; below, 山 (mountain) and 必 (originally a pictograph of a spearhead or ritual vessel, later phonetic) combine to suggest something ‘tightly enclosed’ — not a literal mountain under a roof, but a conceptual space with no openings. This structure reflects its semantic field of closeness and secrecy.
Hi students! Today we’re learning the character 密 (mì), which has 11 strokes and belongs to the 宀 (mián) radical — the 'roof' radical. This tells us the character is often related to spaces, shelter, or things happening under a roof. Though you’ll sometimes see it in historical contexts as the name of an ancient state (like the Zhou-dynasty vassal state of Mi), its modern meanings are far more common and practical.
In daily Chinese, 密 almost always means 'dense', 'tight', 'close-knit', or 'secret'. Think of dense forests (密林), tight security (严密), or confidential information (机密). Its core idea is 'lack of gaps' — whether physically (a thick wall) or abstractly (a closely guarded secret). That’s why it appears in words like 密码 (mìmǎ, 'password') — literally 'secret code'.
Don’t confuse 密 with similar-sounding characters like 秘 (also mì, meaning 'secret') — they’re near-synonyms but used differently: 密 emphasizes tightness or impenetrability, while 秘 stresses hiddenness or mystery. Also, note that 密 is an HSK Level 4 character, so mastering it helps you read news, official notices, and tech-related texts confidently.
Example Sentences
Common Compounds
Similar Characters — Don't Mix These Up
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