The word 'stress' entered English in the 14th century as a shortened form of the Middle English 'distresse', which itself came from the Old French 'estresse', meaning narrowness or oppression. This Old French term traces back to the Latin verb 'stringere', meaning to draw tight, bind, or compress. The core logic of 'tightness' or 'constriction' from its Latin ancestor evolved over centuries. By the mid-17th century, it began to be used in physics to describe a force causing strain on an object. The now-dominant psychological sense, referring to mental strain or pressure, is a remarkably apt metaphorical extension of this physical concept that became common in the 20th century.

The word 'stress' is a simplex word derived from a tight Germanic root. It does not lend itself to segmentation into distinct, meaningful morphemes within its modern English spelling.