Lewis & Short

commento, āvi, 1, v. act., collat. form of 1. commentor, q. v. (cf. Prisc. p. 797 P.), to delineate, sketch; only trop.: ora, humorously, qs. to demonstrate on the face, for to cudgel or beat, Plaut. Men. 5, 7, 30 dub. (Brix, commetavi; cf. 2. commeto).
Hence,

      1. b. commentātus, a, um, pass.: ut sua et commentata et scriptameminisset, Cic. Brut. 88, 301 (just before: secum commentatus in act. signif.): oratio, Q. Cic. ap. Cic. Fam. 16, 26, 1.