econ·o·mize also Brit econ·o·mise 
/ɪˈkɑ:nəˌmaɪz/ verb
econ·o·miz·es; econ·o·mized; econ·o·miz·ing /ɪˈkɑ:nəˌmaɪz/ verb : to use money, resources, etc., carefully [no obj] ▪ He was born into a wealthy family and never learned to economize. — often + on ▪ We're finding new ways to economize [=save] on fuel. [+ obj] (chiefly US) ▪ efforts to economize [=save] fuel/time
