unresponsive
adj. B2 Upper Intermediate US //ˌənɹiˈspɑnsɪv// UK //ˌʌnɹɪspˈɒnsɪv// un·re·spon·sive
adj. not reacting to something or someone. You use this when a person, a machine, or a system does not answer or move when it should.
adj. not reacting to stimuli, commands, or communication. Often used to describe electronic devices, software, or individuals who fail to acknowledge a request.
The computer is unresponsive and won't open any files.
After sending several emails, I realized the server was unresponsive and needed to be restarted.
The patient remained unresponsive to verbal stimuli for several minutes, prompting the medical team to administer a mild sedative to assess his level of consciousness.