εὔθυνσις
From LSJ
ἀσμένῳ δέ σοι ἡ ποικιλείμων νὺξ ἀποκρύψει φάος → glad wilt thou be when night, arrayed in spangled garb, shuts out the light
English (LSJ)
εως, ἡ, (εὐθύνω)
A straightening, opp. κάμψις, Arist. Mete.386a7, IA708b24; τῆς ῥινός Gal.18(1).481.
German (Pape)
[Seite 1071] ἡ, das Gerademachen, Lenken, Richten, Sp. die gerade Richtung; Ggstz κάμψις, Arist. Meteor. 4, 9.