The headword is aorist infinitive, masculine nominative plural, of the verb neoxmo/w (for which cf. nu 223, nu 225). It has evidently been quoted from somewhere, probably [DW] Cassius Dio 71.17.1. No such form occurs in the transmitted text of Herodotus. Nevertheless the reason he is cited here is because the aorist infinitive neoxmw=sai occurs in Herodotus 5.19.1, and both that and the present infinitive neoxmou=n in 4.201.2 (web address 1 and web address 2 below) are used in the sense of hostile action/innovation "against" (kata/) an adversary; hence the present gloss "having moved recently [sc. against]", which is a version of what the ancient glosses on Herodotus 5.19.1 have (neoxmw=sai: newsti\ kinh=sai).
See also epsilon 1241.