Final answer:
To describe inflammation of a vein, the root 'phleb-' or 'ven-' is paired with the suffix '-itis', resulting in the term 'phlebitis'.
Step-by-step explanation:
To build a medical word that means inflammation of a vein, you would need the root word for vein, which is 'phleb-' or 'ven-', and the suffix that denotes inflammation, which is '-itis'. By combining these parts, you get the term phlebitis or venitis. Phlebitis is the more commonly used term in medical contexts to describe the condition of vein inflammation. Certain infections and conditions such as prolonged immobility or insertion of intravenous catheters can lead to phlebitis, which can manifest through symptoms such as redness, warmth, pain, and swelling in the affected area.