辵

辵 is a rarely used, obscure character (벽자, 僻字) that most people never use in daily life. However, this character is very important because it is the base radical of the "radical on the side" form called 책받침 (⻍).

Characters that use the 책받침/착받침 radical generally have meanings related to:

1. walking or movement

2. traveling or going

3. foot traffic or passage

4. transport or communication

5. physics-related elements

Examples:

道 (길 도) — road, way

通 (통할 통) — to pass, to communicate

進 (나아갈 진) — to advance

過 (지날 과) — to pass

近 (가까울 근) — near

遠 (멀 원) — far

逆 (거스를 역) — to go against

速 (빠를 속) — fast

遲 (더딜 지) — slow

追 (쫓을 추) — to chase

送 (보낼 송) — to send

運 (옮길 운) — to transport

逃 (달아날 도) — to escape

迎 (맞을 영) — to welcome