Also sannyasin. Renunciant, mendicant. (Glossary for the Vahinis)

Sannyasi is a person who has given up all worldly desires. He must be fully immersed in desire, design and deed, in the One Godhead and in the discipline to attain Him. Whoever is so immersed is a Sannyasi. (DBG, pp. 13-14)

Those who renounce the fruits while actively engaged in Karma are very dear to Me; they are real Sannyasins, the real Renouncers. (GV, p. 89)

The Sannyasi has to declare his death and perform obsequies for himself and bury his past. He destroys all that binds him to the rest and to his past, his name, his history and his name. He avoids any reminder of his erstwhile adventure, and the pursuit of sensory joy. He flees from his friends and foes, his habits, and habiliments, his hobbies and prejudices. But we find men who have taken the vow of Sannyasa still clinging to their long-established practices and habits. Instead they must completely break with the past. That is why, in the Gita, Karma Sannyasa and not any other types of Sannyasa is prescribed. (TD, p. K 201)