1.
part; site; region (of the body or an object)
A specific location or area, especially of the human body. Commonly used in medical, anatomical, and culinary (meat cuts) contexts.
Please tell me where it hurts.
Literally: Please tell me the part where there is pain.
Usage
部位 is more specific and technical than 部分 (part, portion). While 部分 can refer to any part of anything, 部位 is most naturally used for body parts, anatomical regions, and cuts of meat.
Common collocations
Domain
Frequently used in medical contexts (手術部位 — surgical site) and in butchery/cooking when discussing different cuts of meat.