Arm
Part of speech: noun
Definition: The portion of the upper human appendage, from the shoulder to the wrist and sometimes including the hand. The extended portion of the upper limb, from the shoulder to the elbow. A long, narrow, more or less rigid part of an object extending from the main part or centre of the object, such as the arm of an armchair, a crane, a pair of spectacles or a pair of compasses. A bay or inlet off a main body of water. A weapon. heraldic bearings or insignia
Part of speech: verb
Definition: To supply with a weapon or weapons. To prepare a tool or a weapon for action, to activate.
Forearm
Part of speech: verb
Definition: To arm in preparation.
Part of speech: noun
Definition: The part of the arm between the wrist and the elbow.