Split or divided, especially describing a lip or palate that is naturally split from birth (cleft lip or cleft palate).
From 'cleft,' the past participle of 'cleave' (to split), plus the adjective suffix -ed. The word has been used medically since at least the 18th century to describe birth conditions.
Before modern surgery, cleft palate was a serious medical condition that affected speech and eating, and now the term 'clefted' sits at the intersection of medicine and language—it's one of the few words where a grammatical past participle became a permanent medical descriptor.
Complete word intelligence in one call. Free tier — 50 lookups/day.