キョウ, わき, わけ

armpit, the other way, another place, flank, supporting role

JLPT0 G7 S10 F1806

Effectively a variant form of # (one's side), with the flesh element repositioned, and emphasizing the physical points the *armpits* and the *sides/flanks* → *side*. Compare and .

[Full Kanji Etymology List]