'unnerving' definitions:
Definition of 'unnerving'
(from WordNet)
adjective
Inspiring fear; "the formidable prospect of major surgery"; "a tougher and more redoubtable adversary than the heel-clicking, jackbooted fanatic"- G.H.Johnston; "something unnerving and prisonlike about high grey wall" [syn: formidable, redoubtable, unnerving]