How does aqua relate to the word aquamarine?

The word "aquamarine" is derived from the Latin words "aqua" and "marina," meaning "water" and "sea" respectively.

Here's how it breaks down:

* Aqua: This is the Latin word for "water," which gives us the English word "aquatic."

* Marina: This is the Latin word for "sea," which is also related to the English word "marine."

When combined, "aquamarine" literally means "water of the sea," which perfectly describes the color of the gemstone - a bluish-green shade reminiscent of the ocean.