Do you know “我” originally meant “weapons/arms” but not “I/me”? Why it meant “weapons/arms”? That’s because it includes the radical weapon 戈. So if a word has a “戈,” it relates to “weapons/arms.”
戈, originally dagger-axe, can serve as a radical to express meanings related to weapon or arms.
P.S. Pay attention to the words in blue, which have already lost their original meanings related to “weapons/arms.”
Characters with the radical weapon 戈