"kṣetrajña ātmā puruṣaḥ
pradhānaṁ prakṛtiḥ striyām"
kṣetra-jñaḥ - the word kṣetrajña; ātmā - the living entity; puruṣaḥ - the enjoyer; pradhānam - the chief; prakṛtiḥ - the material nature; striyām - in the feminine gender.
This is a quotation from the Svarga-varga (7) of the Amara-kośa dictionary.