What does "inefficiency" mean?

Lack of efficiency or effectiveness.

Inefficiency

Common synonyms include: asynergy, budget issues, bumbling, disability, disablement, disorganizations.

noun

noun ·5 syllables ·Uncommon ·College level

Noun

1
Lack of efficiency or effectiveness. countable, uncountable
"Yet only 21 percent of adult TANF recipients are working today, largely because of these inefficiencies and loopholes."
2
unskillfulness resulting from a lack of efficiency wordnet

"This inefficiency is a result of the animal's large body and massive legs and feet, which contribute a sideways motion to its walk."

From in- + efficiency.