壹 (yī) — one (financial/formal uppercase form used on checks and legal documents)

Definition

壹 (yī) is the formal uppercase form of 一, used on checks, invoices, and contracts to prevent fraud. Read as 'one' — same meaning, but never in everyday writing.

numeral
one (financial/formal uppercase form used on checks and legal documents)

Examples

  • 壹。
    Qǐng bǎ zhè bǐ jīn é xiě chéng yī qiān yuán zhěng.
    Please write this amount as one thousand yuan exactly.
  • 壹。
    Fā piào shàng bì xū yòng dà xiě yī děng shù zì.
    On the invoice you must use uppercase numbers like 壹.
  • 壹。
    Hé tong jīn é xiě de shì yī bǎi wàn yuán.
    The contract amount is written as one million yuan.

Origin

Sound + meaning
六书liùshū
形声xíngshēng

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
壺壺hú
Sound part声符shēngfú
吉
吉jí壹yī
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

壹 pairs 壺, a vessel shape, with 吉, which provides the sound.

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