Lexical Definition

‎συναντιλαμβάνομαι‎ synantilambánomai (soon-an-tee-lam-ban'-om-ahee) to help G:V
from ‎σύν‎ and ‎ἀντιλαμβάνομαι‎

help.

Usage: 5 forms in 5 verses
Form Translated As     In Verse(s)
συναντιλαμβάνεται joins to help Rom.8.26
συναντιλήψονται they shall aid LXX.Num.11.17
συναντιλήψονταί shall give aid LXX.Exod.18.22
συναντιλήψεται shall be an aid LXX.Ps.89.21
συναντιλάβηται she may help Luke.10.40

Abbott-Smith

συν-αντι-λαμβάνομαι [in LXX: Ge 30:8 R (†), Ex 18:22, Nu 11:17 (נשׂא), Ps 88 (89):21 (כּוּן ni.) * ;]
to take hold with at the side for assistance; hence, to take a share in, help in bearing, and generally, help (with various constructions, v. LXX, ll. c., Deiss., LAE, 83 f.): c. dat., Lk 10:40, Ro 8:26.†

Abbott-Smith References

Book Refs
Genesis 30:8
Exodus 18:22
Numbers 11:17
Psalms 89:21
Luke 10:40
Romans 8:26

Liddell-Scott-Jones

συναντιλαμβάνομαι-λαμβάνομαι,

middle, help in gaining a thing, τῆς ἐλευθερίας [Refs 3rd c.BC+]; τῆς θεραπείας [Refs 1st c.BC+]; assist in supporting, τὴν ὁρμὴν τοῦ λαοῦ [LXX]: absolutely, render assistance, περί τινων [Refs 3rd c.BC+]; εἴς τι [Refs 3rd c.BC+]

__II with dative, take part with, help, [LXX+NT]

LSJ Scripture Refs: LXX.Num.11.17LXX.Exod.18.22LXX.Ps.88.22*Luke.10.40