[ in-i-fish-uh n-see ]
/ ˌɪn ɪˈfɪʃ ən si /

noun, plural in·ef·fi·cien·cies for 2.

the quality or condition of being inefficient; lack of efficiency.
an instance of inefficiency: This work is riddled with inefficiencies.

Origin of inefficiency

First recorded in 1740–50; ineffici(ent) + -ency Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for inefficiency