IPA: /ˌhaɪpərˈtɛnʃən/
KK: /haɪˈpɜr.tən.ʃən/
A medical condition where the blood pressure in the arteries is consistently too high, which can lead to health problems.
The doctor diagnosed her with hypertension after measuring her blood pressure several times.
Hypertension is formed from "hyper-" (meaning over or excessive) and "tensio" (from Latin, meaning tension or pressure). The word describes a condition of excessive tension or pressure in the blood vessels.
Think of 'hyper-' meaning excessive and 'tensio' relating to pressure — hypertension refers to having excessive pressure in the blood.