The term is a modern English compound noun formed from two distinct Latin-derived words. 'Substance' originates from substantia, meaning 'that which stands under' or the essential nature of a thing, which evolved to denote physical matter or material. 'Abuse' comes from abusus, from the verb abuti, meaning 'to use up' or 'to misuse'. The compound 'substance abuse' logically combines these elements to denote the 'misuse of material', specifically referring to the harmful or excessive consumption of psychoactive chemicals. It emerged in the mid-20th century as a clinical and legal term to categorize the problematic use of drugs and alcohol, shifting focus from moral failing to a pattern of detrimental behavior.

Structure: substance (material) + abuse (misuse) - substance: From Latin substantia (essence, material), from substare (to stand under). In this compound, it functions as the noun specifying the object being misused. - abuse: From Latin abusus (misuse), from abuti (to use up, misuse). In this compound, it functions as the noun indicating the act of harmful or improper use.