戦
セン, いくさ, たたか.う, おのの.く, そよ.ぐ, わなな.く, せ
war, battle, match
JLPT3 G4 S13 F78
As per
單
# (weapon) +
戈
spear/halberd → use various weapons to beat enemies into submission or to death → *fight*; *war*.
[Full Kanji Etymology List]