1
- a large, heavy hammer used for such jobs as breaking rocks and driving in fence posts（用于锤岩石和篱笆打桩的）大锤。
1.1
- as modifier powerful; forceful强有力的; 有力的：
sledgehammer blows.
强有力的打击。
1.2
- as modifier figurative ruthless, insensitive, or using unnecessary force〈喻〉无情的; 麻木不仁的; 用力过大的：
under his sledgehammer direction, anything of subtlety is swamped.
在他鲁莽的指挥下, 任何精细的东西都被糟蹋掉了。