= Apollonius Sophistes, Homeric Lexicon 167.10; Synagoge chi35; cf. Apion in Ludwich 102.27; Hesychius chi203 (where the second translation offered here for the headword receives explicit sanction), Etymologicum Magnum 807.23, and the scholia to Homer, Iliad 4.222 (where the headword appears: web address 1 below).
The headword, xa/rmh (A) in LSJ, is apparently derived from xai/rw ("to delight, enjoy"), like chi 130. It came to mean specifically eagerness for or enjoyment of fighting, as in Homer. Then, by metonymy, xa/rmh could substitute for "battle" itself (ma/xh). Latacz, followed by Chantraine, DELG s.v. xai/rw, insists that the original meaning is 'eagerness for battle' rather than 'enjoyment of' vel sim.