do a thing wittingly

From LSJ

πόθῳ δὲ τοῦ θανόντος ἠγκιστρωμένη ψυχὴν περισπαίροντι φυσήσει νεκρῷ → pierced by sorrow for the dead shall breathe forth her soul on the quivering body

Source

English > Greek (Woodhouse Extra)

εἰδώς τι πράσσειν