Dictionary entry

συνκατατίθημι

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

συν-κατα-τίθημι

(Rec. συγκ-), [in LXX: Ex 23:1 (יָדשִׁית), 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.†