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