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