Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

con-certo, āvi, ātum, 1, v. a., to contend with any one zealously or warmly (rare but class.; cf. aemulor).

  1. I. In gen.: te audio nescio quid concertasse cum ero, Ter. Ad. 2, 2, 3: pro explorato habebat, Ambiorigem proelio non esse concertaturum, * Caes. B. G. 6, 5: de regno, Suet. Aug. 21: aves nandi velocitate concertant, Col. 8, 15, 4.
    Poet., with dat.: triclinia templis concertant, Manil. 5, 507.
  2. II. Esp., to dispute, debate (only so in Cic.): (Pompeius) saepius cum hoste conflixit, quam quisquam cum inimico concertavit, Cic. Imp. Pomp. 10, 28: cum aliquo verbo uno, id. Att. 3, 12, 2: cum Apolline de tripode, id. N. D. 3, 16, 42: concertantes super cenam de nobilitate generis, Suet. Calig. 22.

concertor, āri, 1, v. dep.; collat. form of concerto, q. v. (late Lat.), Vulg. Sap. 15, 9; id. Ecclus. 38, 29.