Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
mā̆cresco, crŭi, 3, v. inch. n. [1. macer], to grow lean, meagre: algor eas et famis macrescere cogit, Varr. R. R. 2, 5, 15; 3, 5, 3: macrescit pecus, Col. 6, 3, 1: macrescunt animalia, Veg. Vet. 1, 7, 2: invidus alterius macrescit rebus opimis, grows thin at, pines away at, * Hor. Ep. 1, 2, 57: curionem agnum Plautus pro macro dixit, quasi cura macruisset, Paul. ex Fest. s. v. curionem, p. 60 Müll.