WordNet 3.0 Copyright © 2006 by Princeton University.
- 1. grim, inexorable, relentless, stern, unappeasable, unforgiving, unrelenting, implacable (vs. placable)
- usage: not to be placated or appeased or moved by entreaty; "grim determination"; "grim necessity"; "Russia's final hour, it seemed, approached with inexorable certainty"; "relentless persecution"; "the stern demands of parenthood"
- 2. persistent, relentless, unrelenting, continual (vs. sporadic)
- usage: never-ceasing; "the relentless beat of the drums"
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See also: relentless (Dictionary)