The word 'stenosis' is a direct borrowing from Modern Latin, which itself was constructed from Greek components. The Greek root 'stenos' (στενός) carries the literal meaning of "narrow," a concept traceable to the Proto-Indo-European root sten-, also associated with tightness or constriction. The suffix '-osis', from Greek '-ωσις', was used to form nouns indicating a state or condition, particularly in pathological contexts. Thus, the term's logic is transparent: it literally means "the condition of being narrow," which was directly adopted into medical English to precisely describe the pathological narrowing of anatomical structures like arteries or spinal canals.

Structure: sten (narrow) + osis (condition) 'sten' is from Greek 'stenos', meaning narrow or close. 'osis' is a Greek-derived suffix used in medical terminology to denote a process, condition, or state, often an abnormal one.