Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† synanchē, ēs, f., = συνάγχη, an inflammation of the throat, a sore-throat, quinsy, Gell. 11, 9, 1; Cael. Aur. Acut. 3, 3; Veg. Vet. 1, 38, 3; cf. Cels. 4, 4, 1.