The unglossed primary headword is an epic/Ionic two-ending adjective, here in the masculine/feminine accusative plural; see generally LSJ s.v. tanuh/khs and tau 84. The headword is taken to be quoted from Homer, Iliad 16.768 (web address 1), where the winds toss the tapered boughs of the trees against one another; cf. Hesychius s.v.
For the tanu- prefix see also tau 84, tau 85, tau 86, tau 87, tau 88, tau 89.
[1] The additional lemma is the neuter of the headword in the nominative/vocative/ accusative singular. Glossed identically by the Synagoge and in Lexica Segueriana 381.25; cf. Etymologicum Magnum 745.41 (Kallierges), Photius' Lexicon s.v. tanu/mhkes, and (according to Adler) the Etymologicum Genuinum. Among other Homeric instances, tanu/hkes occurs at Homer, Iliad 14.385 (web address 2), where Poseidon bears a dreadful sword, with long point; cf. the scholia thereto, Hesychius, and Apollonius' Homeric Lexicon 149.10. [In her critical apparatus Adler reports that ms V reads tetame/non, the masculine or neuter accusative participle.]