"unnerving" in the verb sense
1. faze, unnerve, enervate, unsettle
disturb the composure of
"unnerving" in the adjective sense
1. formidable, redoubtable, unnerving
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"
Source: WordNet® (An amazing lexical database of English)
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