IPA: /ɪmˈpɜːrfəreɪt/
KK: /ɪmˈpɜrfəˌreɪt/
Describing something that does not have any openings or holes.
The imperforate membrane prevented any fluid from passing through.
A type of stamp that has no holes or perforations along its edges, making it solid and uncut.
The collector was excited to find an imperforate stamp from the early 20th century.
Imperforate is formed from "im-" (meaning not) and "perforare" (meaning to pierce or bore through). The word describes something that is not pierced or does not have holes.
Think of 'not' ('im-') and 'piercing' ('perforare') to remember that 'imperforate' means something that is not pierced.