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.4.61Pet.5.5
αντιτασσόμενοσ by resisting LXX.1Kgs.11.34LXX.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 . Πέρσῃσι[Refs 5th c.BC+]; . 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.18.6Rom.13.2LXX.Prov.3.15