ratchet

• n. 棘轮；棘齿
• vt. 安装棘轮于；松脱

词态变化

中文词源

来自法语 rochet,线轴，纺锤，词源同 rock,rocket.引申词义棘轮。插入字母 t,比较 bake,batch.

英文词源

ratchet

ratchet: [17] Ratchet was originally acquired, in the form rochet, from French rochet. This was a diminutive form descended ultimately from Frankish *rokko ‘spool’, which is related to English rocket. The notion of having teeth, which is central to the idea of a ratchet, therefore appears to be historically secondary; it presumably arose from the addition of ‘teeth’ to a rotating ‘spool’ or ‘spindle’ in a machine. The change from rochet to ratchet, which began in the 18th century, may have been influenced by German ratsch ‘ratchet’.
=> rocket

ratchet (v.)

1852, from ratchet (n.). Transferred sense attested by 1977. Related: Ratcheted; ratcheting.

ratchet (n.)

1650s, rochet, from French rochet "bobbin, spindle," from Italian rocchetto "spool, ratchet," diminutive of rocca "distaff," possibly from a Germanic source (compare Old High German rocko "distaff," Old Norse rokkr), from Proto-Germanic *rukka-, from PIE root *ruk- "fabric, spun yarn." Compare rocket (n.2). Current spelling in English dates from 1721, influenced by synonymous ratch, which perhaps is borrowed from German Rätsche "ratchet."

双语例句

1. He fears inflation will ratchet up as the year ends.

他害怕通货膨胀会在年终更加严重。

来自柯林斯例句

2. A ratchet mechanism transfers the thread from spool to bobbin.

一种棘齿装置把线从线轴转到梭心上。

来自柯林斯例句

3. The chair has a ratchet below it to adjust the height.

这把椅子下面有棘轮调整高度。

来自柯林斯例句

4. We're trying to ratchet down the administrative costs.

我们正在想法控制管理成本。

来自柯林斯例句

5. Obviously, the regular crimp wave provides a mechanism for short - range entanglement of the ratchet type.

虽然, 有规则的卷曲波纹能使纤维间短片段内彼此纠缠接触,产生棘轮式机械作用.

来自辞典例句