IPA: /ˌhaɪpəˈkɒndrɪəkl/
KK: /haɪpəˈkɒndrɪəkl/
Relating to a person who is excessively worried about their health and often believes they are ill, even when they are not.
His hypochondriacal tendencies made him visit the doctor frequently, despite being perfectly healthy.
Hypochondriacal → It is formed from "hypo-" (meaning under or below) and "chondros" (meaning cartilage, but historically associated with the area of the body where the ribs meet the sternum, thought to be the seat of melancholy). The suffix "-iac" (meaning pertaining to) indicates a condition. Thus, hypochondriacal refers to a condition pertaining to an excessive preoccupation with one's health, often believing one is ill.
Think of 'hypo-' meaning 'under' and 'chondros' relating to the body, which helps you remember that hypochondriacal describes someone overly concerned about their health.