| 单词 | rat |
| 释义 | Word Frequency rat(ræt) noun 1. any of numerous long-tailed murine rodents, esp of the genus Rattus, that are similar to but larger than mice and are now distributed all over the world See also brown rat, black rat 2. informal a person who deserts his or her friends or associates, esp in time of trouble 3. informal a worker who works during a strike; blackleg; scab 4. slang, mainly US an informer; stool pigeon 5. informal a despicable person 6. smell a rat verbWord forms: rats, ratting or ratted 7. (intransitive; usually foll by on) informal a. to divulge secret information (about); betray the trust (of) b. to default (on); abandon he ratted on the project at the last minute 8. (intransitive) to hunt and kill rats Derived forms ratlike (ˈratˌlike) adjective Word origin Old English rætt; related to Old Saxon ratta, Old High German rato |
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