"ineptitudes" in the noun sense
1. awkwardness, clumsiness, ineptness, ineptitude, maladroitness, slowness
unskillfulness resulting from a lack of training
2. worthlessness, ineptitude
having no qualities that would render it valuable or useful
"the drill sergeant's intent was to convince all the recruits of their worthlessness"
Source: WordNet® (An amazing lexical database of English)
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