When it comes to seeking permission to borrow something, there are plenty of synonyms that can be employed in order to express the request. For instance, terms like "approval to borrow" or "authorization to borrow" are commonly used to convey the same idea. Alternatively, someone may also use phrases like "clearance to borrow" or "leave to borrow" when making such a request. Similarly, "consent to borrow" or "permission to use" can also be used in these scenarios. Ultimately, all of these phrases carry the same meaning, and they can all be used interchangeably to communicate the request to borrow something.