Origin

Bamboo grows naturally as hollow tubes, so the character combines the bamboo radical at the top to indicate it's made from bamboo, with a sound-hint component below that suggests the pronunciation. The combination makes sense because bamboo tubes were historically the most common cylinder-shaped objects in East Asia, and the character evolved to describe any similar hollow tube or pipe. Over time the meaning expanded to include related objects like gun barrels and sleeves, anything with a tubular or hollow shape.

AI-generated (claude-haiku-4-5), not yet reviewed. Formation type (automated guess): Phono-semantic (meaning + sound hint).