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