εἰκοῦς

From LSJ

πέτρην κοιλαίνει ρανὶς ὕδατος ἐνδελεχείῃ → 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

Source

French (Bailly abrégé)

gén. sg. contr. de εἰκών.

Russian (Dvoretsky)

εἰκοῦς: Eur. стяж. gen. к εἰκών.