The headword infinitive and the glossing phrase do not make a good match, and the latter seems to have strayed in from mu 276. Photius (mu145 Theodoridis) and Hesychius (mu396) have better glosses for mathreu/ein (a verb unattested outside lexicography): Photius masteu/ein, zhtei=n; Hesychius mateu/ein, zhtei=n. For masteu/ein see mu 257.