κρεμαστέον
From LSJ
σταγόνες ὕδατος πέτρας κοιλαίνουσιν → constant dropping wears away a stone, constant dripping will wear away the hardest stone, little strokes fell big oaks, constant dripping wears the stone, constant dropping wears the stone, constant dripping will wear away a stone
English (LSJ)
one must hang, Sor. 1.51, Gp.16.1.11.
Greek (Liddell-Scott)
κρεμαστέον: ῥημ. ἐπίθ., δεῖ κρεμᾶν, Γεωπ. 16. 1.