What words have the prefix quadraginta?

The prefix "quadraginta-" is Latin for "forty", but it's not commonly used in English. You're more likely to see the prefix "quadra-" which means "four" or "four times".

Here are some examples:

* Quadrant: A quarter of a circle or a plane.

* Quadrangle: A four-sided figure.

* Quadrilateral: A polygon with four sides.

* Quadruped: An animal that walks on four legs.

* Quadruple: To multiply by four.

If you're looking for words specifically with the prefix "quadraginta-", they would be very uncommon in English. You might find them in scientific or technical contexts, but they wouldn't be part of everyday language.