unrelenting
🇺🇸
/ˌʌnrɪˈlentɪŋ/
🇬🇧
/ˌʌnrɪˈlentɪŋ/
constant and not stopping
The unrelenting rain made it impossible to go outside.
persistent and not giving up
Despite the challenges, she remained unrelenting in her pursuit of success.