This verb means to arm or equip oneself, particularly with weapons or armor for battle. In 1 Peter 4:1, it's used metaphorically: 'Since therefore Christ suffered in the flesh, arm yourselves with the same way of thinking.' Peter transforms military imagery into spiritual exhortation—just as soldiers equip themselves with weapons, believers should equip themselves with Christ's mindset toward suffering. The metaphor implies deliberate preparation and readiness for hardship, not passive resignation but active mental and spiritual armament.