牙关紧闭症

• 牙(fang; tusk)ASSOCIATIVE

The character 牙 is a drawing of fangs biting tightly together.

• 丷(two diagonal strokes (opening/closing))ASSOCIATIVE
• 天(sky; heaven)ASSOCIATIVE

A door with a bolt underneath the sky is where things open and close, connecting to everything.

• 又(hand; again)ASSOCIATIVE
• 糸(thread; silk strand)RADICAL

A hand grasping thread tightly creates tension and tautness.

• 門(door; leaf)RADICAL
• 才(talent; just now)PHONETIC

When you close the door, the talent inside cannot escape outside.