in ‧ ef ‧ fi ‧ cient /ˌɪnəˈfɪʃ ə nt◂, ˌɪnɪˈfɪʃ ə nt◂/ BrE AmE adjective
not using time, money, energy etc in the best way OPP efficient :
an inefficient use of resources
Local government was inefficient.
—inefficiently adverb
—inefficiency noun [uncountable and countable] :
problems due to the inefficiency of management