γραμματική ἐστιν ἐμπειρία τῶν παρὰ ποιηταῖς τε καὶ συγγραφεῦσιν ὡς ἐπὶ τὸ πολὺ λεγομένων → grammar is a practical knowledge of the usage of poets and writers of prose
calm: P. ἡσύχιος, P. and V. ἥσυχος, ἡσυχαῖος.
free from care: P. and V. ἀπράγμων (Euripides, Fragment), ἄπονος, V. ἕκηλος, ἄμοχθος.
painless: P. and V. ἄλυπος, V. ἀλύπητος.