Of uncertain affinity; to stir or agitate (roil water) -- trouble.
b. tropically, "to cause one inward commotion, take away his calmness of mind, disturb his equanimity; to disquiet, make restless" (the Sept. for בִּהֵל, etc.; passive, ταράσσομαι for רָגַז, to be stirred up, irritated); α. to stir up: τόν ὄχλον, Acts 17:8; (τούς ὄχλους, Acts 17:13 L T Tr WH). β. to trouble: τινα, to strike one's spirit with fear or dread, passive, Matthew 2:3; Matthew 14:26; Mark 6:50; Luke 1:12; (Luke 24:38); 1 Peter 3:14; παράσσεται ἡ καρδία, John 14:1, 27; to affect with great pain or sorrow: ἑαυτόν (cf. our to trouble oneself), John 11:33 (A. V. was troubled (some understand the word here of bodily agitation)) (σεαυτόν μή ταρασσε, Antoninus 4, 26); τετάρακται ἡ ψυχή, John 12:27 (Psalm 6:4); ἐταράχθη τῷ πνεύματι, John 13:21. γ. to render anxious or distressed, to perplex the mind of one by suggesting scruples or doubts (Xenophon, mem. 2, 6, 17): Galatians 1:7; Galatians 5:10; τιναλόγοις, Acts 15:24. (Compare: διαπαράσσω, ἐκπαράσσω.)