Question

spartan means :
accepting that everything that happens is inevitable
enhancing respiratory and circulatory efficiency
of or pertaining to hearing or the ear
marked by simplicity, frugality, or self - denial

Explanation:

The term "spartan" is derived from the ancient Spartans known for their simple, frugal, and self - denying lifestyle.

Answer:

marked by simplicity, frugality, or self - denial