Radicals ( Radical98) four strokes in Kanji;

dimensional, e.g.

www.jisho.org radical number 76 ... ;

directional, e.g.

;

logical, e.g.

in Kanji: fail; gap; lack; yawning;

numerological, e.g.

4;

structural, e.g.

IFF SQRT2 design model (e.g. DVD), plus, and minus are one-after-another like coexistence, flip-flop, on-and-off, ... ;

Radicals;