What does "ineptness" mean?

The quality or degree of being inept.

Ineptness

Common synonyms include: awkwardness, clumsiness, ineptitude, artlessness, being unable to work, fumbling.

noun

noun ·3 syllables ·Uncommon ·Advanced level

Noun

1
The quality or degree of being inept. uncountable, usually
"The ineptness of the novice jugglers was apparent as they frequently dropped their juggling pins."
2
the quality of having the wrong properties for a specific purpose wordnet
3
unskillfulness resulting from a lack of training wordnet

""Jerk" connotes an embarrassing social and verbal ineptness."

From inept + -ness.