; not yielding or swerving in determination or resolution, as of or from opinions, convictions, ambitions, ideals, etc.; inflexible: an unrelenting opponent of the Equal Rights Amendment.
not easing or slackening in severity: an unrelenting rain.
maintaining speed, effort, vigor, intensity, rate of advance, etc.: an unrelenting attack.
1. relentless, merciless, unmerciful, ruthless, pitiless, cruel, remorseless. 2. unremitting, implacable, inexorable.