The headword adjective, du/sodos, appears to be unglossed, but in fact the glossing follows an inserted phrase (on which see n. 1).
[1] This phrase is lacking, Adler reports, in mss FV; and duso/dhs is an odd adjective found only here. Perhaps an error for du/sodos o(/dos, as in Pollux 3.96 (with the same meaning).
[2] From traxu/s, an adjective used (besides other meanings) to emphasize geographic ruggedness or roughness. Thus it can occur as a toponym. For instance, in Strabo (12.1.3 and passim) the western part of Cilicia is *traxei=a *kiliki/a, “Rough Cilicia” (web address 1); in Herodotus 4.99.3 the south-eastern part of the Crimea is called trhxe/hs (web address 2); and cf. Pliny the Elder, Natural History 5.115: "Ephesus… vocata et Smyrna est, cognomine Trachia", ("Ephesus ... is also called Smyrna, with the appellative of Trachia").