ἀναμφιλέκτως
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
indiscutiblemente, sin disputa, sin dudar
Russian (Dvoretsky)
ἀναμφιλέκτως: Luc., Sext. = ἀναμφιλόγως (бесспорно, неоспоримо, без возражений, охотно).