not to be placated or appeased or moved by entreaty; grim determination; grim necessity; Russias final hour, it seemed, approached with inexorable certainty; relentless persecution; the stern demands of parenthood

[ Syn: grim , inexorable , stern , unappeasable , unforgiving , unrelenting ]

never-ceasing; the relentless beat of the drums

[ Syn: persistent , unrelenting ]