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