Lexical Definition

‎τάραχος‎ tárachos (tar'-akh-os) disturbance ^G:N-M
masculine from ‎ταράσσω‎

stir.

• a disturbance, i.e. (popular) tumult

Abbott-Smith

τάραχος, -ου, ὁ (< ταράσσω), [in LXX for מְהוּמָה, etc. ;]
later form of ταραχή (Xen., al.; v. Thackeray, Gr., 159): Ac 12:18 19:23.†

Abbott-Smith References

Liddell-Scott-Jones

τάραχος [τᾰ], ὁ,

={ταραχή}, [LXX+5th c.BC+]

_{LSJ Scripture Refs: LXX.Esth.1.1}