hesitate, waver, falter
蹰 centers on unsteady movement caused by indecision: hesitating, wavering, or faltering before acting.
蹰 combines 足 (foot) with 厨, which likely contributes the sound. The character expresses hesitant foot movement.
The foot radical 足 suggests movement, while 厨 looks like a kitchen. Picture someone pacing back and forth in a kitchen, unable to decide what to cook—hesitating and wavering.
For チュウ, imagine a chef named Chu who hesitates before adding the final spice: Chu -> チュウ, and his faltering step matches the foot radical.