steel

n.钢，钢铁 vt.使坚强，使硬起心肠

steal, stealth, stealthily, stealthiness, stealthy, steam, steam iron, steam radio, steam train, steam-engine, steam-ship, steam-shovel, steamboat, steamer, steamgauge, steaminess, steamroller, steamship, steamy, steed, steel band, steel wool, steel worker, steel-plated, steeliness, steelworks, steely, steelyard, steep, steepen, steepish, steeple, steeplechase, steeplechaser, steeplejack, steeply, steepness, steer, steerage, steerage-way,