IPA: //ʌn.rɪˈspɒn.sɪv//
KK: /ʌnˈrɛspənˌsɪv/
Not reacting or responding to something; showing no signs of awareness or engagement.
The patient remained unresponsive after the treatment.
Comparative: more unresponsive
Superlative: most unresponsive
Unresponsive → It is formed from "un-" (meaning not) and "responsive" (from Latin "respondere", meaning to answer). The word "unresponsive" means not answering or not reacting to stimuli.
Think of 'not' ('un-') answering ('respondere') — that's why unresponsive means not reacting.