φθίδιος
From LSJ
Ἡ δὲ Σελήνη γενομένη μὲν ἐκ τῆς ἀντανακλάσεως τοῦ ἡλιακοῦ φωτὸς → the moon having been made from the reflection of sunlight (Vettius Valens, Anthologies 1.14)
English (LSJ)
α, ον, (φθίω)
A perishable, Hsch. (post φθόσις).
German (Pape)
[Seite 1271] schwindend, vergänglich, von kurzer Dauer, Hesych.