What is an string instrument that is similar to a Violin, but larger in size and with a lower and deeper sound?

Context: The viola is a string instrument that is bowed, plucked, or played with varying techniques. Slightly larger than a violin, it has a lower and deeper sound. Since the 18th century, it has been the middle or alto voice of the violin family, between the violin and the cello. The strings from low to high are typically tuned to C3, G3, D4, and A4.

Answer: The instrument you are looking for is a Viola.