Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Inability is regular. It follows the -ies Conversion rule.
Use plural verbs: "The inabilities are ready" (not "is ready").
Yes. The plural inabilities is standard across all English variants.
The word inability follows the standard English pluralization rule. When forming the plural, inability becomes inabilities. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why inability becomes inabilities helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using inabilities in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The inabilities are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.