Noun
1. a small, carnivorous mammal of the weasel family, having a long, slender body, short legs, and a bushy tail. It is native to Europe, Asia, and Africa, and has been introduced to other parts of the world, where it is sometimes kept as a pet or used to control rodents.
- *Mustela putorius furo*
2. an informer, especially one who informs on criminals.
Verb
3. search (a person or place) thoroughly, typically for something concealed.
4. track or pursue someone or something with determination.