דניאל ב:מ פירוש: רש״י

And a fourth kingdom will be as hard as iron, as you saw the thighs, which are the fourth from the head, the breast, and the belly, and they are of iron.

crumbles and flattens everything flattens and crumbles all kinds of metal, which are flattened with a hammer.

and flattens Aram. וְחָשֵּׁל, and flattens. There are many such [words] in the Talmud. Keth. 77a, “who thins copper for kettles (חַשְּׁלָא דוּדֵי)”; Hul. 93a: “crushed testicles (בֵּיעֵי חֳשִּׁלָתָא).”