KanjiJLPT N1
Diameter

diameter, path, method

Mnemonic

The postman refuses to walk around the circular sacred garden. Instead, he cuts straight through its center — his daily shortcut traces the exact diameter of the holy grounds every single morning, wearing a narrow path into the grass.
Additional thoughts
Picture the postman's worn trail as a perfectly straight line bisecting the round sacred garden. The path IS the diameter.
Quick recall
The postman crosses the sacred circle dead-center, tracing its diameter.

Details

The keyword for 径 is diameter. This kanji refers to the measurement of a straight line passing through the center of a circle or sphere, representing the concept of a direct path or shortcut. By extension, it can also mean a small path or trail, emphasizing the idea of a direct, narrow route from one point to another. The underlying sense ties together the notions of directness and the shortest distance across something.
On'yomi
けい
Kun'yomi
みち、こみち、さしわたし、ただちに