Therefore the question is prakṛtiṁ puruṣaṁ caiva kṣetraṁ kṣetrajñaṁ eva ca. This is material nature and anyone who is trying to enjoy this material nature, he is called puruṣa. Purusa means enjoyer and prakṛti means enjoyed. Just like in ordinary life we see a man is supposed to be enjoyer and the woman is supposed to be enjoyed, similarly, prakṛti is feminine gender and puruṣa is masculine gender. Anyone who is trying to enjoy, he is puruṣa. It doesn't matter, outwardly he's dressed as man or women; if he has got the desire to enjoy, that is called puruṣa. And his object that is enjoyed, that is called prakṛti.
So Arjuna is asking this question, prakṛtiṁ puruṣaṁ caiva: "Kindly give me instruction about this prakṛti and puruṣa." Kṣetram. Kṣetram means the field of activity, and kṣetrajñam. Kṣetrajñam means one who knows, "This is my field." Just like the cultivator, he cultivates the land. From government there is demarcation of the land. The cultivator knows, "This is my portion of land." Similarly, every one of us, we are cultivating and we are given a field. This is the body.