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
con-tĕmĕro: āvi, 3,
I v. a., to stain, pollute, defile (very rare): torum dominae, Ov. Am. 2, 7, 18: manus, Mart. Spect. 10, 2.