Usage: 3 forms in 4 verses
Form Translated As     In Verse(s)
συσφίγξεισ close LXX.Deut.15.7
συνέσφιγξεν fastened LXX.Lev.8.7
συνέσφιγξε he fastened LXX.Exod.39.21LXX.1Kgs.18.46

Liddell-Scott-Jones

συσφίγγω (susphingō) to condense G:V

συσφίγγω,

bind close together, τοὺς ἀγκῶνας [LXX+3rd c.BC+]; gird up, τὴν ὀσφύν[LXX]; grasp, ἄκροις δακτύλοις τὸ προβόλιον[Refs 5th c.BC+]; compare σύσφιγμα.

LSJ Scripture Refs: LXX.Exod.36.29*LXX.1Kgs.18.46