Hello
ετοιμασθέν means "prepared" (ancient Greek) and it is passive past participle.
It comes from the verb "ετοιμάζω" = "prepare" , in Simple Past Passive Voice -> "ετοιμάσθην"
ετοιμασθείς -> masculine
ετοιμασθείσα -> feminine
ετοιμασθέν -> neuter
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.