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Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
subs.
dearest: use P. and V. φίλτατος (rare P.).
a beloved one: P. and V. παιδικά, τά (Eur., Cycl. 584).