Lewis & Short

incentīvus, a, um, adj. [incino], that strikes up, sets the tune (ante- and post-class.).

  1. I. Lit.: tibia, the treble flute (opp. succentive, that plays the accompaniment), Varr. R. R. 1, 2, 15.
    1. B. Transf., superior: vita pastorum (opp. succentiva vita agricolarum), Varr. R. R. 1, 2, 16.
  2. II. Trop., that provokes or incites: lues, Prud. Hamart. 250.
    Hence,
    1. B. Subst.: incentīvum, i, n., an incentive: peccaminis, Prud. Apoth. 929: vitiorum, Hier. Ep. 52, 3.
      Adv.: incen-tīvē, Ven. Fort. Vit. Leob. 10.