simple and without comfort
spartan - severe
The word ‘spartan’ refers to something, like a lifestyle, environment, or existence, that is marked by strictness, frugality, and avoidance of any form of luxury. Such a way of being is generally sought or imposed in order to simplify life and to enhance self-discipline.
The students lived in rather spartan accommodation. They were provided with the necessities and nothing more.
John lives a very spartan lifestyle that leaves little room for enjoyment or comforts. I think he is far too hard on himself.
It is mentally and physically taxing, but I’m going to be sticking to this spartan diet until I lose my desired amount of weight.