arm
US /ɑːrm/
UK /ɑːrm/

1.
each of the two upper limbs of the human body from the shoulder to the hand.
:
•
She held the baby in her arms.
•
He broke his arm playing football.
1.
provide (a soldier, country, etc.) with weapons.
:
•
The government decided to arm the rebels.
•
They need to arm themselves against potential threats.