Lexical Definition

‎ῥιζόω‎ rhizóō (hrid-zo'-o) to root ^G:V
from ‎ῥίζα‎

root.

• to root (figuratively, become stable)

Abbott-Smith

ῥιζόω, -ῶ (< ῥίζα), [in LXX: Is 40:24, Je 12:2 (שׁרשׁ), Si 3:28 24:12 * ;]
to cause to take root. Metaph., to plant, fix firmly, establish: pass. (EV, rooted), ἐν ἀγάπῃ, Eph 3:18 (17) ; ἐν Χριστῷ, Col 2:7 (cf. ἐκ ριζόω).†

Abbott-Smith References

Liddell-Scott-Jones

ῥιζόω-όω,

cause to strike root: metaphorically, plant, fix firmly, ὅς μιν [τὴν ναῦν] λᾶαν θῆκε καὶ ἐρρίζωσεν ἔνερθεν [Refs 8th c.BC+]; [νήσους] κατὰ βυσσὸν πρυμνόθεν (assuming variant) [Refs 3rd c.BC+]:—passive, of trees and plants, take root, strike root, [Refs 5th c.BC+] —middle, ἄριστον ῥιζόωώσασθαι, of the fig, [Refs]; so αἱ πίνναι ἐρρίζωνται, opposed to ἀρρίζωτοι, [Refs 4th c.BC+]; ὀδὸς βάθροισι γῆθεν ἐρριζωμένος made fast or solid, [Refs 5th c.BC+]; of a bridge, αἰώνιος ἐρρίζωται [Refs]

__2 metaphorically, ἐρρίζωσε τὴν τυραννίδα [Refs 5th c.BC+] —passive, τυραννὶς ἐρριζωμένη[Refs 5th c.BC+]; ἐξ ἀμαθίας πάντα κακὰ ἐρρ. have their root in.., [Refs 5th c.BC+]; ἐν ἀγάπῃ ἐρρ. [NT]
__II passive also of land, to be planted with trees, ἀλωὴ ἐρρίζωται [Refs 8th c.BC+]

_{LSJ Scripture Refs: Eph.3.18}