σφήν, σφηνός, ὁ,
wedge, [[ 5th-6th c.BC: Aristophanes Comicus “Ranae” 801, 3rd c.BC: Apollonius Rhodius Epicus 1.1204, 4th c.BC: Aristoteles Philosophus “Mechanica” 853a19, “PCair.Zen.” 759.2 (3rd c.BC), etc.] Refs 5th c.BC+]; used as an instrument of torture, [[ 4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 64, 1st-2nd c.AD: Plutarchus Biographus et Philosophus 2.498d, LXX.4Mac.8.13, +others [σφην- probably from σφᾱν-, compare σφάνιον and see entry σφηνόπους.] ] LXX+4th c.BC+]