The word 动脉瘤 is formed by combining 动 (meaning 'move' or 'dynamic'), 脉 (meaning 'pulse' or 'vessel'), and 瘤 (meaning 'tumor' or 'swelling'); 动脉 together means 'artery,' referring to blood vessels with pulsating flow, and when 瘤 is added, it specifies a pathological swelling on an artery, resulting in the term for aneurysm.