克

this ke is the CONQUEROR’S HELMET it means DOMINATE CONQUER SUBDUE RESTRAIN

课

this ke is the FRUIT OF THE LECTURE

嗑

this ke is the MOUTH Going to CRUNCH SEEDS from a Pan

All are 4th tone. shan

啟

qi3 open

dakai de yi si

hand knocks on door; mouth asks “who’s there”, hand opens door.

Oracle bone script had no mouth. Simplified has no hand.

Open Mouth
Push Door with Hand
Enter
Now QI3