Quick Definition
τάραχος, ου, ὁ n.m. a disturbance, commotion
Strong's Definition
masculine from 5015; a disturbance, i.e. (popular) tumult
KJV Usage: stir
UBS Dictionary of the Greek New Testament
noun, m. | -ου | ταράσσω
39.5 · Hostility, Strife · Opposition, Hostility
commotion, serious trouble a serious disturbance
25.243 · Attitudes and Emotions · Worry, Anxiety, Distress, Peace
great distress, extreme anxiety a state of acute distress and great anxiety, with the additional possible implications of dismay and confusion Since τάραχος refers to the type of extreme anxiety which borders on fear, it may be possible in some languages to use a double expression, ‘were greatly distressed and afraid.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
τάραχος, -ov, ὁ, (Tapdocw), commotion, stir (of mind): Acts xii. 18; tumult (A.V. stir], Acts xix. 28. (Sept.; Xen., Plut., Leian.)
Mounce Concise Greek Dictionary
τάραχος tarachos 2x
agitation, commotion; consternation, terror, Acts 12:18; excitement, tumult, public contention, Acts 19:23*
Abbott-Smith Greek Lexicon
τάραχος, -ου, ὁ
(< ταράσσω), [in LXX for מְהוּמָה, etc. ;]
later form of ταραχή (Xen., al.; v. Thackeray, Gr., 159): Ac 12:18 19:23.†
Moulton & Milligan — Vocabulary of the Greek NT
τάραχος, a late form of ταραχή, is found in Ac 1215, 1973, where it is masculine. For exx. of τὸ τάραχος in the LXX see Thackeray Gr. i. p. 159. According to Hobart (p. 93) the word is common in medical writers. Linde, picurus Ῥ. 24, quotes three passages from Epicurus for τάραχος (masc.) = ‘‘ disturbance,” ‘‘alarm,” and notes two occurrences of the form ταραχή. See also Rutherford WV/, Pp: 174.
Liddell-Scott-Jones — Greek-English Lexicon
τάραχος (tarachos) — disturbance. τάρᾰχος [τᾰ], ὁ, ={ταραχή}, [LXX+5th c.BC+]