εὐγώνιος
From LSJ
Τί κοινότατον; ἐλπίς. καὶ γὰρ οἷς ἄλλο μηδέν, αὕτη πάρεστι → What is most common? Hope. For those who have nothing else, that is always there.
English (LSJ)
ον,
A with regular angles, X.Oec.4.21, Arist.Pr.912b15; with perfect angles, four square, of blocks, IG22.1666A64, etc.; right-angled, Gal.18(2).856.
German (Pape)
[Seite 1060] gut-, geradwinkelig; Eur. Ion 1037 πλέθρου μῆκος; Xen. Oec. 4, 21 u. Sp.