Liddell-Scott-Jones

σφηνόω (sphēnoō) to wedge ^G:V

σφηνόω-όω,

shape like a wedge, [Refs]:—passive, to be cloven with a wedge, [Refs 4th c.BC+]; κλίνη χρυσῷ ἐσφηνόωωμένη inlaid, [Refs 2nd c.AD+]

__2 fix by means of a wedge, [Refs 2nd c.BC+]:—passive, to be wedged in, εἰς τὸ μέσον [Refs 2nd c.BC+]; to become fixed like a wedge, [Refs 2nd c.AD+]
__3 plug up, close up, τρήματα σπόγγοις [Refs 5th c.BC+] —middle, τὸ πρόθυρον σφήνου close the vestibule, [Refs 2nd c.AD+]:—passive, falsa lectio in [σφηνόωωθῇ ἡ ὀπή “Geoponica” 9.10.4 ">Refs 1st c.AD+]; σφηνόωοῦνται τὰς κεφαλάς they catch a cold in the head, [Refs 3rd c.AD+]; σφηνόωωθεὶς ἀπέθανεν, of obstruction, [Refs]
__II torture, rack (see. σφήν), [Refs 1st c.AD+]