节省 (jié shěng): to save, to economize

In order to save money, our family decided not to eat out or buy new clothes this month.

Walking to work every day lets you exercise and save on transportation costs—it kills two birds with one stone.

Using this new method can save a lot of time, so we can finish the project ahead of schedule.

To save energy, we should turn off lights when leaving a room and set the air conditioner a bit higher in summer.

Save your spare change; although you save only a little each time, over a year you can put aside enough for a trip.