lakṣaṇaṁ kavayo viduḥ

artha-asrayatvam-that which conveys the meaning of an object; sabdasya-of sound; drastuh-of the speaker; liṅgatvam-that which indicates the presence; eva-also; ca-and; tanmatratvam-the subtle element; ca-and; nabhasah-of ether; laksanam-definition; kavayah-learned persons; viduh-know.