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“inability”
1. A lack of capacity or means to do something: Grandmother was blind and therefore had the inability to see.
2. Absence of enough power, capacity or resources: Although Tim had been in school for many years, he still had the inability to read up to grade level.
2. Absence of enough power, capacity or resources: Although Tim had been in school for many years, he still had the inability to read up to grade level.
(speaking a foreign language in English; the inability to tell what a person does not mean until he/she has spoken)