The future perfect of perii/sthmi, third person singular, is glossed with the equivalent form of its more familiar future passive.
Same entry in the Synagoge, Lexica Segueriana 338.20 and Photius' Lexicon (pi682 Theodoridis), and similarly already in Hesychius pi1676. Outside these lexica, the word occurs four times in Cyril of Alexandria (e.g. On the Holy Trinity 465.21, 638.12), and this appears to be the first attestation of a future perfect of the verb (at a time when the special force of the perfect was probably no longer felt).