συν-τίθημι

[in LXX: 1Ki.22:13 (קָשַׁר), etc. ;]

to place or put together, in various senses. Mid.

__(a) to observe, perceive;

__(b) to determine, agree, covenant: with inf. Luk.22:5; before τοῦ, with inf. Act.23:20; before ἵνα, Jhn.9:22.†

συν-επι-τίθημι,

[in LXX for שִׁית, etc. ;]

to help in putting on. Mid. to join in attacking (Thuc.): Act.24:9 (RV, joined in the charge).†

(AS)

to place or put together; to observe, perceive; to determine, agree, covenant