un·nerve 
/ˌʌnˈnɚv/ verb
un·nerves; un·nerved; un·nerv·ing /ˌʌnˈnɚv/ verb [+ obj] somewhat formal : to make (someone) feel afraid or upset and unable to think clearly
▪ Seeing the police in there unnerved me. ▪ She was unnerved by his strange manner.
▪ Seeing the police in there unnerved me. ▪ She was unnerved by his strange manner.
— unnerving adjective [more unnerving; most unnerving]
▪ I had an unnerving encounter with her yesterday. ▪ The news of my brother's accident was unnerving.
▪ I had an unnerving encounter with her yesterday. ▪ The news of my brother's accident was unnerving.
— un·nerv·ing·ly /ˌʌnˈnɚvɪŋli/ adverb
▪ The neighborhood was unnervingly quiet.
/ˌʌnˈnɚvɪŋli/ adverb ▪ The neighborhood was unnervingly quiet.
