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