Dehisced means to split or open, usually in reference to a plant. The antonyms for dehisced are words that mean closed, sealed, or unopened. These include words such as sealed, closed, intact, unbroken, and whole. Other antonyms that may apply depending on the context include words like attached, fixed, secured, and cohesive. For example, a closed or sealed seed pod would be the antonym of a dehisced one. It is important to consider the context of the word dehisced in order to appropriately identify its antonyms.