The headword, evidently quoted from somewhere, is a neuter singular nominative (or accusative) adjective.
The entry in LSJ gives the spelling χαμαιρεπής while Adler prints the headword showing gemination of the ρ . Four of Adler's mansucripts (F, G, S, and M) show the headword with a single ρ (χαμαιρεπές ).
Adler identifies this entry with Lexicon Ambsrosianum 100; cf. Hesychius chi136.