Georg Autenrieth, A Homeric Dictionary

τανύω, τάνυ_μι (Att. τείνω), aor. (ἐ）τάνυ（ς）σα, mid. pres. τάνυται, ipf. τανύοντο, aor. part. τανυσσάμενος, pass. perf. τετάνυσται, plup. τετάνυστο, aor. 3 pl. τάνυσθεν, part. τανυσθείς: I. act., stretch, strain, extend, as in ‘stringing’ a bow, a lyre, Od. 21.407, 409; ‘holding horses to their speed’ with the reins, Il. 23.324; ‘drawing’ the shuttle to and fro in weaving, Il. 23.761; and in general of ‘arranging’ anything long or broad, spears, spits, tables, Il. 9.213, Od. 15.283, Od. 1.138. Metaph., ἔριδα πολέμοιο, μάχην, πόνον, ἔριδος πεῖραρ, Ξ 389, Il. 13.359.—II. pass. and mid., be stretched or extended, be tight; the cheeks ‘became full’ again, Od. 16.175; of mules, horses ‘stretching out,’ ‘laying themselves out’ to run, Il. 16.375, 475, Od. 6.83; νῆσος τετάνυσται, ‘extends,’ Od. 9.116.— Mid., subjectively, Il. 4.112; reflexive, Od. 9.298.