克
コク, か.つ, かつ, まさる, よし

overcome, kindly, skillfully

JLPT1 G7 S7 F1333

The relevant oracle bone form of this character shows a helmeted head# + 儿 person → helmeted warrior, stretched to full height (compare 亟). *Overcome* and *conquer* are borrowed meanings.

[Full Kanji Etymology List]