ὑποστύφω · hypostyphō — LSJ
to be somewhat astringent, Dsc. 1.118; ὑποστῦφον ἥδυσμα Plu. Ant. 24; of astringent tastes, screw up the mouth, οὖλα Nic. Al. 17.
treat a part with an astringent, οἴνῳ v.l. in Hippiatr. 106.
make astringent, ἄρωμα Thphr. Od. 22 (Pass.).
thicken somewhat, τὸ ἔλαιον ib. 17.