Surrounding walk radical (Kangxi #162) — three strokes, the simplified form of
辵, wrapping from below-left around the right and bottom. Carries the meaning:
遍 'everywhere, all the way through, once over completely' is fundamentally a movement that covers ground. Anchors
遍 alongside
进 (advance),
过 (pass),
还 (return),
通 (through),
道 (way) — the full travel family.