/ ˌʌnrɪˈlentɪŋ; NAmE / adjective ( formal )
1.
( of an unpleasant situation ) not stopping or becoming less severe
SYN relentless :
unrelenting pressure
The heat was unrelenting.
2.
if a person is unrelenting , they continue with sth without considering the feelings of other people
SYN relentless :
He was unrelenting in his search for the truth about his father.
► un·re·lent·ing·ly adverb