relating to the body as opposed to the mind

शारीरिक

English Usage: She enjoys physical activities such as running and swimming.

Hindi Usage: वह शारीरिक गतिविधियों जैसे दौड़ना और तैरना पसंद करती है।

the most important or central part

मुख्य

English Usage: The main issue is how to improve productivity.

Hindi Usage: मुख्य मुद्दा उत्पादकता बढ़ाने का है।