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Use "persistant" in a sentence
"So, people use the term persistant vegetative state."
"Her husband, Michael Schiavo, says that he knows that its her wish that she not go on living in a state that has been described as persistant vegetative, permanent vegetative state, a condition from which it as my understanding no one has been able to reverse"
"February 1990 Terri Schiavo collapsed at her home and entered what doctors called a persistant vegetative state."