emotion

The Latin verb 'emovere' meant to move out, to dislodge, to stir up physically. Roman writers used it for armies routing troops, floods displacing earth, and earthquakes shifting foundations. The noun 'emotio' appears in Cicero's writings, referring to a disturbance of the mind: still physical in connotation, still a matter of things being shifted from their proper place. The idea that feeling is a kind of movement is older than any philosophy that named it.

French took the Latin root and made 'émotion' in the 16th century, where it first meant public commotion: a civil disturbance, a crowd set in motion by events. Thomas Hobbes used an anglicized form in 'Leviathan' in 1651, and John Locke helped cement it in English philosophical usage by the century's end. By then 'emotion' had narrowed from political upheaval to internal experience, though it kept the original sense of being displaced by something external.

René Descartes, writing 'Les Passions de l'âme' in 1649, used 'émotion' to describe the body's animal spirits being agitated by perception. His framework kept the mechanical sense: emotions were movements of fluid through the body, not purely mental events. This framing shaped how physicians and philosophers discussed inner life for the next two centuries. It was not far from the Latin origin, and its shadow falls on even modern neuroscience.

The modern psychological sense of 'emotion' as a discrete inner state, distinct from cognition and will, became dominant in English only in the 19th century. William James, writing in 1884, proposed that we feel sad because we cry rather than crying because we feel sad, reversing the assumed direction of the movement. The word had traveled from Roman floods to French riots to English philosophy without losing its root metaphor. Every 'emotional' person is, in the word's own etymology, someone set in motion.