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