径
ケイ, みち, こみち, さしわたし, ただちに
diameter, path, method
JLPT1 G4 S8 F1435
巠# is 巛 (a variant form of 川) river between a horizontal line at top and 工 at bottom (originally 土 earth) → river/watercourse extending between two distant points. 徑 adds 彳 movement → proceed along an extensive *path* → *diameter*; *direct*.
[Full Kanji Etymology List]