prehypertension

noun

pre·​hy·​per·​ten·​sion ˌprē-ˈhī-pər-ˌten-chən 

: slightly to moderately elevated arterial blood pressure that in adults is usually indicated by a systolic blood pressure of 120 to 139 mm Hg or a diastolic blood pressure of 80 to 89 mm Hg and that is considered a risk factor for hypertension

prehypertensive

-ˈhī-pər-ˌten(t)-siv 

adjective