Lexical Definition

‎φρυάσσω‎ phryássō (froo-as'-so) to rage ^G:V
akin to ‎βρύω‎, ‎βρύχω‎

rage.

• to snort (as a spirited horse), i.e. (figuratively) to make a tumult

Abbott-Smith

† φρυάσσω (so Ps, l.c., NT; elsewhere depon., φρυάσσομαι, Att.. -ττ-), [in LXX: Ps 2:1 (רָגַשׁ), II Mac 7:34 R, III Mac 2:2 * ;]
prop., of horses, to neigh, whinny and prance (Plut., al.). Metaph., to be wanton, insolent: Ac 4:25 (LXX).†

Abbott-Smith References

Liddell-Scott-Jones

φρυάσσομαι-άσσομαι,

Attic dialect φρυάσσομαιάττομαι, properly of spirited, high-fed horses, neigh, whinny and prance, [Refs 3rd c.BC+]; φ. πρὸς τοὺς ἀγῶνας neigh eagerly for the race, [Refs 1st c.AD+]; also of a cock, [Refs 2nd c.AD+]

__2 metaphorically of men, to be wanton, haughty, insolent, [φρυάσσομαιάσσου “Anthologia Graeca” 12.33 (1st c.BC: Meleager Epigrammaticus), compare 2nd c.AD: Galenus Medicus 10.180: also with \_accusative\_, Ἔρωτες σκῦλα φρυάσσομαιασσόμενοι “APl.” 4.215 (1st c.AD: Philippus Epigrammaticus)">Refs 1st c.BC+]; φ. ἐπί τινι to be proud of a thing, [Refs 1st c.BC+]
__3 transitive, ={καταπλήττω}, [Refs 4th c.BC+]
__II active φρυάσσομαιάσσω [LXX+NT]; of birds, [Refs 1st c.AD+]

_{LSJ Scripture Refs: LXX.Ps.2.1 ☩ Acts.4.25}