ὀξυμέριμνος
From LSJ
εἰ γάρ κεν καὶ σμικρὸν ἐπὶ σμικρῷ καταθεῖο καὶ θαμὰ τοῦτ᾽ ἔρδοις, τάχα κεν μέγα καὶ τὸ γένοιτο → for if you add only a little to a little and do this often, soon that little will become great (Hesiod W&D, 361-362)
English (LSJ)
ον,
A keenly laboured or studied, παλαίσματα Ar.Ra.877 (lyr.).
German (Pape)
[Seite 353] scharfe Sorge erregend, od. geschärfte Sorgfalt erfordernd, od., richtiger, durch scharfe, spitze Sorgfalt sein ausgesonnen, παλαίσματα, von Aeschylus u. Euripides Wortstreit, Ar. Ran. 877.