Abbott-Smith Manual Greek Lexicon
συν-τίθημι (G4934)
3 συν-τίθημι [in LXX: I Ki 22:13 ( קשׁר ), etc. ;] to place or put together , in various senses. Mid., to observe, perceive ; to determine, agree, covenant : c. inf., Lk 22:5 ; seq. τοῦ , c. inf., Ac 23:20 ; seq. ἵνα , Jo 9:22 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain