Radicals ( Radical991) seven strokes in Kanji;

dimensional, e.g.

Laser Shield;

YIN and YANG;

directional, e.g.

WHEN lights exist, DEE also coexist;

logical, e.g.

in Hiragana: antithesis; couple; pair; set;

counter for items (e.g. pairs) ... ;
counter for sets (e.g. clothes set, small furniture, utensil) ... ;

in Kanji: compare; versus;

equal; even;

opposite; IFF prefix: anti* ;

vis-à-vis, in relation to, with regard to;

Tsui (family name, surname); Tsuizaki (family name, surname);

numerological, e.g.

7;

structural, e.g.

good, as opposed to bad, on the hand, bad, as opposed to good;

Radicals;