辺
ヘン, あた.り, ほと.り, べ, なべ

environs, boundary, border, vicinity

JLPT2 G4 S5 F428

The lower part of 臱 is 方 (spread) + 穴 hole → separate holes that are in close proximity. The addition of 自 (nose) specifies the apertures of a nose, the latter an object forming a border between the two sides of a face. 邊 is as per 臱# (border) + 辵 movement → move to a *border*/*boundary* → *vicinity*; *end*; *edge* → *side* (of a polygon).

[Full Kanji Etymology List]