武
ブ, ム, たけ.し, う, お, たけし, たけん, ん
warrior, military, chivalry, arms
JLPT2 G5 S8 F387
The relevant bronzeware inscription form combines 止# (stand straight) + 戈 spear/halberd → armed warrior(s) attending on a superior → *martial*; *military* → *ferocious*.
[Full Kanji Etymology List]