The headword is an athematic form of the (second) aorist indicative active, third person singular, of the compound verb parape/tomai (cf. LSJ s.v.; Smyth, §687, §682). The gloss is the same form of the verb pare/rxomai, with nu-movable.
As Adler notes, Photius (pi387 Theodoridis) and Lexica Segueriana 332.19 have the same entry. The lexicographers' source is unclear, but the headword is twice attested outside them: Achilles Tatius, The Story of Leucippe and Cleitophon 2.7.3 (cf. alpha 4695), and ps.-Basil of Seleuceia, Life and Miracles of St. Thecla 2.28.