harmonica
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
Latin > German (Georges)
harmonica, ae, f., Vitr. 5, 4, 1. Censor. fr. 11, 1.
Latin > English
harmonica harmonicae N F :: theory of music/harmony; harmonics; science of sound