terrier

noun5

1. •
   A dog from a group of small, lively breeds, originally bred for the hunting of burrowing prey such as rats, rabbits, foxes, and even otters; this original function is reflected in some of their names (e.g. rat terrier).
2. •
   Someone displaying terrier-like qualities such as determined pursuit.

   • One of the LNER dispatch staff is a terrier when it comes to masks, challenging anyone without them. — 2020
3. •
   An inventory (book or roll) in which the lands of private persons or corporations are described by their site, boundaries, number of acres, etc.; a terrar.
4. •
   (historical) A collection of acknowledgments of the vassals or tenants of a lordship, containing the rents and services they owed to the lord, etc.
5. •
   An auger or borer.