walk, walking, road radical variant (no. 162)
辶 centers on movement along a path: walking or traveling. It is primarily used as a radical variant that conveys the idea of a road or going.
辶 is a simplified variant of the radical 辵, which historically combined 彳 (step) and 止 (foot) to express walking or movement along a road.
The shape suggests a path with a curved top and a straight bottom stroke, like a road stretching forward. Think of it as the road you walk on.
For チャク, imagine putting on your walking shoes with a firm 'chak' sound as they click into place: chak -> チャク, and then you start walking.
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