economize

economize [i(:)ˈkɔnəmaiz] vt., vi.

1. ■ 更经济地使用[处理]; 节约, 节省

economize time [energy, money] 节省时间[精力、金钱]

He economized by using trams instead of taking a taxi every time he went to school. 他上学搭电车而不坐出租汽车, 以节省钱。