- [adjective] 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"
Synonyms: grim, inexorable, stern, unappeasable, unforgiving, unrelenting
- [adjective] never-ceasing; "the relentless beat of the drums"
Synonyms: persistent, unrelenting
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