节俭 (jié jiǎn): frugal; economical

Although he has already earned a lot of money, he still maintains frugal living habits and never wastes a single cent.

My grandmother is very frugal; she always saves the water from washing vegetables to water the flowers and never wastes anything.

When the family budget is tight, a frugal lifestyle can help us get through difficult times.

In order to buy their own house as soon as possible, the young couple has been living a frugal life and rarely eats out.

He was taught to be frugal from a young age, so even though he has a good income now, he never buys luxury goods.