IPA: /ʌnˈɑːrmd/
KK: /ʌnˈɑrmd/
Not having any weapons or protective gear; defenseless.
The police approached the suspect, who was unarmed and posed no threat.
Unarmed → It is formed from "un-" (meaning not) and "armed" (from Old English "earmian", meaning to equip or provide with weapons). The word "unarmed" means not equipped with weapons or defenseless.
Think of 'not' ('un-') being combined with 'equipped with weapons' ('armed') — that's why unarmed means without weapons.