Which word is both a noun and a verb: hammer or screwdriver?
hammer /'hæmɚ/
n. 铁锤, 音锤, 链球
vi.& vt. 敲打,锤击，重复
[近义词]：
n. striker, hand tool, sports equipment, power tool
v. beat
[惯用语]：
electric hammer 电锤
hammer at 敲打；致力于
hammer head 锤头；弦槌
air hammer 气锤
hammer throw 链球；掷链球
[例句]:
• We hammer metal with a hammer.
我们用铁锤锤打金属。
• He bashed his finger with a hammer.
他用锤子砸伤了自己的手指。
• He hammered the nails into the wall.
他把钉子钉进墙壁。
screwdriver /'skrʊ'draɪvɚ/
n. 螺丝刀;螺丝起子; 改锥
[近义词] n. hand tool
[惯用语]：
air screwdriver 风动螺丝刀
screwdriver set 成套螺丝刀
philips screwdriver 十字螺丝刀
[例句]：
• A coin can act as a screwdriver.
硬币可充当螺丝起子。
• Have you brought my screwdriver back yet?
你把我的螺丝刀带来了吗?
译句：哪个词既是名词又是动词：锤子或螺丝刀？
答案：hammer
