χαλίνωσις
From LSJ
ο φίλος τον φίλον εν πόνοις και κινδύνοις ου λείπει → a friend does not abandon his friend in difficulties and in danger, a friend in need is a friend indeed
English (LSJ)
εως, ἡ,
A bridling, X.Eq.3.11 (pl.), v.l. in Poll.1.184.
German (Pape)
[Seite 1328] εως, ἡ, das Zäumen od. Aufzäumen, Xen. equ. 3, 11.