Definition of "unnerving" []

• Present participle of unnerve. (verb)

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• "What makes Conficker so unnerving is that at least once a day, each infected machine tries to connect sequentially with a list of 250 Internet domains for further instructions."
• "The ground continued to heave in unnerving spasms."
• "The most unnerving is when we are brushing our teeth in the bathroom and we turn around - to spot a man, on the hill maybe 100 meters away — just standing with his hands behind his back … observing … us in our bathroom … brushing our teeth."