un·re·lent·ing 
/ˌʌnrɪˈlɛntɪŋ/ adjective
/ˌʌnrɪˈlɛntɪŋ/ adjective 1 : not slowing down, stopping, or growing weaker
▪ unrelenting pressure ▪ The pain is unrelenting. [=the pain never stops] ▪ She has endured unrelenting [=relentless] criticism. 2 — used to describe someone who does something in a constant and determined way without stopping or becoming less forceful ▪ an unrelenting taskmaster ▪ She was unrelenting in her demands for justice.
▪ unrelenting pressure ▪ The pain is unrelenting. [=the pain never stops] ▪ She has endured unrelenting [=relentless] criticism.
— un·re·lent·ing·ly adverb
▪ I found the movie to be unrelentingly bleak.
▪ I found the movie to be unrelentingly bleak.
