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