forearm; lower arm
Refers to the part of the arm from the elbow to the wrist. Often used in anatomical or medical contexts, contrasting with 上腕 (upper arm) and sometimes 前腕 (forearm).
I'll introduce exercises to train the forearm muscles.
Fractures are often seen in the radius of the forearm.
Compound of 下 (lower) and 腕 (arm). The reading かわん is a straightforward combination of the on'yomi readings of the characters.