ἀπολιόρκητος
From LSJ
ὁ χρόνος ἐστὶ δάνος, τὸ ζῆν πικρός ἐσθ' ὁ δανίσας → time is a loan, and he who lent you life is a hard creditor | time is on loan and life's lender is a prick
English (LSJ)
ον,
A impregnable, Str.12.3.31, Plu.2.1057e.
German (Pape)
[Seite 312] nicht zu belagern, nicht zu erobern, Strab.; nicht belagert, Plut. de Stoic. absurd. 1.