Lexical Definition

‎ἀντιτάσσομαι‎ antitássomai (an-tee-tas'-som-ahee) to resist G:V
from ‎ἀντί‎ and the middle voice of ‎τάσσω‎

oppose themselves, resist.

Usage: 7 forms in 11 verses
Form Translated As     In Verse(s)
Ἀντιτασσομένων When are opposing Acts.18.6
ἀντιτασσόμενοσ resisting Rom.13.2
ἀντιτάσσεται does he resist Jas.5.6
opposes Jas.4.6 • 1Pet.5.5
αντιτασσόμενοσ by resisting LXX.1Kgs.11.34 • LXX.Hos.1.6
αντιτασσόμενον was rebelling LXX.Esth.3.4
αντιτάσσεται resists LXX.Prov.3.34
αντιτάξομαι I shall resist LXX.1Kgs.11.34
I will resist LXX.Hos.1.6

Abbott-Smith

ἀντι-τάσσω (Att., -ττω), [in LXX for לוּץ hi., נשׂא, etc.;]
to range on battle against; mid., to set oneself against, resist: absol., Ac 18:6; c. dat., Ro 13:2, Ja 4:6 5:6, I Pe 5:5 (MM, VGT, s.v.).†

Abbott-Smith References

Book Refs
Acts 18:6
Romans 13:2
James 4:6 · 5:6
1 Peter 5:5

Liddell-Scott-Jones

ἀντιτάσσω,

Attic dialect ἀντιτάττω, set opposite to, range in battle against, τὸ ἄριστον ἀ. Πέρσῃσι[Refs 5th c.BC+]; ἀ. τὸν νόμον πρὸς τὴν ἀναίδειαν set the law in opposition to their impudence, [Refs 5th c.BC+]:—so in middle, πρὸς τὸ ἐμπειρότερον αὐτῶν τὸ τολμηρότερον ἀντιτάξασθε[Refs 5th c.BC+]

__II middle, set oneself against, meet face to face, ἀντιτάξομαι κτενῶν σε[Refs 5th c.BC+]:—passive, to be drawn out in array against, τινί[Refs 5th c.BC+]
__II.2 generally, oppose, resist, [NT+2nd c.BC+]
__II.3 set against, compare, [LXX]

LSJ Scripture Refs: Acts.18.6 ☩ Rom.13.2 ☩ LXX.Prov.3.15