/ ˌɪnɪˈfɪʃnt; NAmE / adjective
not doing a job well and not making the best use of time, money, energy, etc. :
an inefficient heating system
inefficient government
an extremely inefficient secretary
inefficient use of time and energy
OPP efficient
► in·ef·fi·ciency / -ənsi; NAmE / noun [ U , C ] ( pl. -ies ):
waste and inefficiency in government
inefficiencies in the system
► in·ef·fi·cient·ly adverb