引发
yǐnfā · HSK 7
trigger
🧨 引 pull/draw + 发 emit/send-out = pull out and set off a reaction
引 means draw or pull (as in drawing a bow), and 发 means to emit or send out. Together, pulling something draws out and sets off a result — it triggers or evokes an effect.
引 — bow 弓 + vertical stroke 丨
A compound ideograph showing a bow 弓 with a vertical line 丨 representing the drawn bowstring. The original meaning was 'to draw a bow,' which extended to 'pull,' 'lead,' 'guide,' and 'cite.' The vertical stroke depicts the action of pulling the string back.
发 — simplified form of 發; from 癶 (two feet) + 弓 (bow) + 殳 (weapon)
The traditional form 發 depicted shooting an arrow from a bow, with 癶 showing outstretched feet and 弓 the bow, giving the core sense of 'send out, discharge.' From this came extended meanings like 'issue, emit, develop.' The modern simplified 发 also absorbed 髮 (hair), so it now covers both 'to send out' and 'hair.'