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