IPA: /ˌʌn.rɪˈlɛn.tɪŋ/
KK: /ʌnˈrɪlɛntɪŋ/
Showing a strong and determined attitude without giving up or becoming less intense.
The unrelenting rain caused flooding in many areas.
Unrelenting → It is formed from "un-" (meaning not) and "relent" (from Old French *relentir*, meaning to become less severe or intense) and the suffix "-ing" (indicating the action or process). The word describes a state of not becoming less severe or intense, indicating persistence or determination.
Think of 'not' ('un-') becoming 'less severe' ('relent') — that's why unrelenting means not letting up or being persistent.