Lexical Definition

‎συγκατατίθεμαι‎ synkatatíthemai (soong-kat-at-ith'-em-ahee) to consent G:V
middle from ‎σύν‎ and ‎κατατίθημι‎

consent.

Usage: 2 forms in 3 verses
Form Translated As     In Verse(s)
συγκατατεθειμένοσ having consented Luke.23.51
συγκαταθήση assent together LXX.Exod.23.1
assent together with LXX.Exod.23.32

Abbott-Smith

συν-κατα-τίθημι (Rec. συγκ-), [in LXX: Ex 23:1 (יָד שִׁית), ib. 32 (כּרת), Da TH Su 1:20 * ;]
to deposit together. Mid., to deposit one's vote with, hence, to agree with, assent to: c. dat., Lk 23:51.†

Abbott-Smith References

Book Refs
Exodus 23:1 · 23:32
Luke 23:51

Liddell-Scott-Jones

συγκατατίθημι-τίθημι,

deposit together or at the same time, ἐμαυτὴν συγκατέθηκα τάφῳ [Refs 2nd c.AD+]:—middle, [Refs 4th c.BC+]

__2 middle, σ. τινὶ τὴν αὐτὴν δόξαν περί τινος (where δόξαν represents ψῆφον) put down the same vote or opinion with another, agree entirely with him, [Refs 5th c.BC+]: with dative only, agree with, assent or conform to, ταῖς δόξαις [Refs 4th c.BC+]; τοῖς παρακαλουμένοις Philipp. cited in [Refs 4th c.BC+]agree that.., [Refs 4th c.BC+]: absolutely, assent, [Refs 3rd c.BC+]active, -θεῖναι εἴς τι agree to, [Refs 3rd c.AD+]