Radicals ( Radical12) two strokes in Kanji;

dimensional, e.g.

Chinese Romanization ( cr) ;

Nippon Syllabary 's one of the characters: ru in Hiragana a.k.a. ru in Katakana;

www.jisho.org radical (no. 10) ... ;

directional, e.g.


logical, e.g.

leg (singular); legs (plural);
supporting part to be standing;

numerological, e.g.


structural, e.g.

at right, there is a line vertically from top to bottom;
at the top, 2 lines are parallel to each other, left becomes a curve;