never-ceasing; "the relentless beat of the drums" Từ đồng nghĩa: persistent, relentless,
harsh; "the brutal summer sun"; "a brutal winter" Từ đồng nghĩa: brutal,
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" Từ đồng nghĩa: grim, inexorable, relentless, stern, unappeasable, unforgiving,