Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Baetis (Bĕtis, Paul. Nol. Carm. ad Aus. 10, 236), is, m. (acc. Baetin, Plin. 3, 1, 3, § 12 (al. Baetim); Mart. 9, 62, 2; Claud. Fesc. 12, 31; Mall. Theod. 285; Claud. Laud. Stil. 2, 238:
1. bēta, ae (bētis, is, Ser. Samm. 54, 9), f. [hence Fr. bette; Engl. beet], a vegetable, the beet: Beta vulgaris, Linn.; Plin. 19, 8, 40, § 132; 20, 8, 27, § 69; Col. 10, 254; 10, 326; 11, 3, 17 and 42; Pall. Febr. 24, 10; * Plaut. Ps. 3, 2, 26; * Cic. Fam. 7, 26, 2; cf. * Cat. 67, 21; Mart. 13, 13; 3, 47, 9; Isid. Orig. 17, 10, 15.
1. bētis, v. 1. beta.
2. Bētis, v. Baetis.
bēto (baeto; in Plaut. bīto), ĕre, v. n. [kindr. with vado and βαίνω], to go (with its derivatives, abito, adbito, ebito, interbito, perbito, praeterbito, rebito, bitienses, only ante-class.): in pugnam baetite, Pac. ap. Non. p. 77, 21 (Trag. Rel. v. 255 Rib.): si ire conor, prohibet betere, id. ib.; Varr. ib.: ad aliquem, Plaut. Curc. 1, 2, 52: ad portum ne bitas, id. Merc. 2, 3, 127.