εὐμηχανία
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)
Dor. εὐμᾱχανία, ἡ,
A skill in devising means, c. inf., Pi.I.4(3).2, Pae.7 Fr.16.11; = εὐπορία, Stoic. 3.64, Plu.Tim.16; inventive skill, Andronic.Rhod.p.578 M., Luc. Phal.1.12.