desenfrenadamente
From LSJ
Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
Spanish > Greek
ἀκολάστως, ἀκρατῶς, ἀκρατέως, ἀνέδην, ἀπηυχενισμένως, ἀτάκτως, ἐκκεχυμένως, ἐκλύτως, ἐνθουσιωδῶς