启 (qǐ) — (bound form) to open, to start; (bound form) to enlighten, to inspire

A bound form seen in set phrases like 启发 (inspire), 启程 (set off), and 启事 (notice). It is not used alone — always combined with another character.

Two or more meaningful parts placed together so that their meanings combine into a new one.

This origin belongs to the traditional form 啟; 启 is its simplified writing.

For 启, the traditional form 啟 comes from an earlier shape with 戶 (door) and 又 (hand), showing a hand opening a door.