| 1. | not relenting; 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. |
| 2. | not easing or slackening in severity: an unrelenting rain. |
| 3. | maintaining speed, effort, vigor, intensity, rate of advance, etc.: an unrelenting attack. |