码
Character Story & Explanation
In contemporary China, 码 most frequently appears in tech-related terms: ‘QR code’ (二维码 èr wéi mǎ), ‘health code’ (健康码 jiànkāng mǎ), and ‘login code’ (登录码 dēnglù mǎ). These usages exploded during the pandemic, when health codes became mandatory for public transit and entry to venues—making 码 one of the most visible characters in daily life. It’s also in common phrases like ‘set a password’ (设置密码 shèzhì mìmǎ).
The character is not pictographic; its earliest attestation is in seal script (c. 3rd century BCE), where it already combined the stone radical 石 with the phonetic component 马 (mǎ, ‘horse’)—a classic phono-semantic compound. No oracle bone or bronze inscriptions contain 码, confirming its later origin as a character coined for specific mineral terminology before being repurposed for ‘code’ in the 20th century.
The character 码 (mǎ) is an HSK Level 4 character with eight strokes and the stone radical 石—indicating its original association with minerals or stones. Though its basic dictionary meaning is 'agate', a banded, semi-precious chalcedony, this sense is now rare in modern spoken Mandarin. Most learners encounter 码 first in technical contexts like ‘barcode’ or ‘password’, where it functions as a phonetic loan meaning ‘code’.
This semantic shift reflects how Chinese repurposes characters based on sound: mǎ approximates foreign terms like ‘code’ (via early transliterations such as ‘mǎ hào’ for ‘mark number’), leading to widespread use in computing and daily tech life. The stone radical remains visually anchored—but no longer semantically active—in these new compounds.
While agate jewelry exists in China—especially in Xinjiang and Yunnan—the word for the gemstone is more commonly 阿古屋 (āgǔwū, from Japanese ‘akoya’) or simply ‘agate’ borrowed as 阿加特 (ājiātè). Thus, 码 serves as a compelling case study in how written form, sound, and usage evolve independently: a stone radical now encodes digital reality.
Example Sentences
Common Compounds
Similar Characters — Don't Mix These Up
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