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