カ, ケ, はな, わ
splendor, flower, petal, shine, luster, ostentatious, showy, gay, gorgeous
JLPT1 G7 S10 F1085
The relevant seal inscription form is as per 于# (U-shaped) + an element combining 垂 hang (doubled) and 艸 grass/plant → beautiful *flower*, the center of which sinks in a U-shape → *gorgeous* (← beautiful). Also, *brilliant* (← brilliant coloring, or brilliant beauty) and *China* (← country likened to a beautiful flower).
[Full Kanji Etymology List]