noun
addiction; habitual use
Refers to a strong habit or addiction, often to a substance or behavior. The term is somewhat formal and may appear in medical or psychological contexts.
常用癖のある薬物は、医師の指導のもとで減らす必要がある。
Drugs that cause addiction must be reduced under a doctor's guidance.
Compound of 常用 (じょうよう, 'habitual use') and 癖 (へき, 'habit, tendency'). The exact historical derivation is uncertain, but the word is conventionally associated with the meaning of addiction or habitual use.