Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ănhēlus, a, um, adj. [anhelo], out of breath, panting, puffing; attended with short breath (only in the poets): sic igitur tibi anhela sitis de corpore nostro Abluitur, * Lucr. 4, 875 dub.: equi, Verg. G. 1, 250, and Ov. M. 15, 418: pectus, Verg. A. 6, 48: senes, who suffer from shortness of breath, id. G. 2, 135: cursus, causing to pant, Ov. M. 11, 347; so, febres, id. P. 1, 10, 5: tussis, Verg. G. 3, 497: dies, Stat. Th. 4, 680: mons, Claud. Rapt. 3, 385.
With gen.: nec soli faciles; longique laboris anhelos Avertit patrius genti pavor, panting on account of the long struggle, Sil. 15, 721 (for this gen. v. Roby. II. § 1318).