inefficiency
— Noun
– English
~ unskillfulness resulting from a lack of efficiency
inefficient
— Adjective
– English
~ lacking the ability or skill to perform effectively; inadequate; "an ineffective administration"; "inefficient workers"
inefficient
— Adjective
– English
~ not producing desired results; wasteful; "an inefficient campaign against drugs"; "outdated and inefficient design and methods"
inefficiently
— Adverb
– English
~ in an inefficient manner; "he dealt inefficiently with the crisis"