butterscotch

n [U] hard toffee made by boiling butter and sugar together 黄油硬糖.

bustling, busty, busy, busy oneself in, busybody, but, but for, butane, butch, butcher, butcher's shop, butchery, butler, butt, butter, butter-bean, butter-fingers, buttercup, butterfly, buttermilk, buttery, buttock, button, button mushroom, button up, button-down, buttoned up, buttonhole, buttonhook, buttress, buxom, buy, buy off, buy out, buy up, buyer, buzz, buzz off, buzz-word, buzzard,