[1] The headword is perfect active of fri/ssw (phi 719), first person singular; evidently quoted from somewhere. (The likeliest possibilities, to judge from scholia, are Aeschylus, Seven Against Thebes 720, and Aristophanes, Clouds 1133.) Likewise or similarly in other lexica; references at Photius pi839 Theodoridis, where the gloss is "from fri/kh" (for this noun see phi 713).
[2] Adler reports similar glossing in the Ambrosian Lexicon; cf. Hesychius, and a scholion on Homer, Iliad 11.383, where pefri/kasi occurs.