1．string：a strong thread made of several threads twisted together, used for tying or fastening things
2．loaf：bread that is shaped and baked in one piece and can be cut into slices
3．yawn：open your mouth wide and breathe in deeply because you are tired or bored
4．component：one of several parts that together make up a whole machine, system, etc.
Ⅱ.根据词性及汉语意思写出单词
5．depth n．深(度)，纵深→deep adj.深的
6．scare vt.使恐惧→scaring adj.令人恐惧的→scared adj.惊恐的，担惊受怕的
7．starve vi.挨饿，饿死→starvation n．饥饿；饿死
8．tough adj.艰难的；不幸的；强壮的，强健的→toughly adv.固执地；强硬地
9．accomplish vt.做成功，完成→accomplishment n．成就；完成
