ἀναλλοίωτος
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.
English (LSJ)
ον,
A unchangeable, Arist.Metaph.1073a11, Cael.270a14; ἀ. τὴν φωνήν D.L.4.17; κάλλος Ph.1.649; of undigested food, Gal.6.575; ἀ. ὕλη Stoic.2.114; not permitting change, Thphr.CP6.10.1.