draw back
黜 centers on the idea of forcing something or someone back: drawing back, retreating, or being dismissed from a position.
黜 combines 黑 (black, dark) with 出 (go out, exit). The historical idea likely involves being cast out into darkness or obscurity, i.e., being dismissed or forced to retreat.
The left side 黑 suggests darkness or disgrace, and the right side 出 means to go out. Picture someone being pushed out into the dark, forced to draw back in shame.
For チュツ, imagine a person being drawn back with a sharp 'chut' sound of dismissal: chut -> チュツ, as they retreat into the shadows.
dismissal