ἀτρέπτως
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.
French (Bailly abrégé)
adv.
sans détour, sans tergiversation, sans hésitation.
Étymologie: ἄτρεπτος.
Spanish
inmutablemente, inexorablemente, inflexible, rígidamente, sin vacilación