This noun follows the standard English plural rule: simply add -s to the singular form.
Armpit is regular. It follows the Standard -s rule.
Use plural verbs: "The armpits are ready" (not "is ready").
Yes. The plural armpits is standard across all English variants.
The word armpit follows the standard English pluralization rule. When forming the plural, armpit becomes armpits. This follows the Standard -s pattern, which is one of the most common plural rules in English.
Understanding why armpit becomes armpits helps with spelling and pronunciation. This noun follows the standard English plural rule: simply add -s to the singular form.
When using armpits in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The armpits are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.