Origins
The English word "emotion" traces its origins to the French term "émotion," which emerged in the 16th century. This French word itself derives from Old French "esmotion," meaning a stirring up or a moving out. The formation of "esmotion" was modeled on the word "motion," which comes from the Latin verb "ēmovēre," meaning to move out, to remove, or to agitate. The Latin "ēmovēre" is a compound of the prefix "ē-" or "ex-" meaning "out" or "out of," and the verb "movēre," meaning "to move" or "to set in motion." The root "movēre" can be traced further back to the Proto-Indo-European root *mewh₂- (or *mewh₁- in some reconstructions), which carried the general sense of pushing away or moving.
Originally, the Latin "ēmovēre" was used in a physical or literal sense, referring to the act of moving something out or away. From this root, Latin gave rise to a family of words in English and other European languages related to movement and motion, including "motion," "motive," "moment," "mobile," "promote," and "remote." The French verb "émouvoir," meaning to stir or to move emotionally, preserves the verbal form and semantic link to the Latin source.
The earliest uses of "emotion" in English, borrowed from French, did not denote the inner feelings or psychological states that the word now signifies. Instead, "emotion" originally referred to a public disturbance, riot, or political agitation—a collective upheaval or stirring of people. This sense of the word as a physical or social agitation persisted into the 16th and early 17th centuries. The semantic field was thus grounded in external, observable movement or disturbance rather than internal, subjective experience.
Figurative Development
Over the course of the 17th and 18th centuries, the meaning of "emotion" underwent a significant semantic shift. The word gradually narrowed from describing external, collective agitation to referring to internal, psychological states—strong feelings or agitations of the mind. This transition reflects a metaphorical extension: just as a crowd might be stirred into motion, so too might the soul or mind be stirred from within. The idea of emotion as something that moves or agitates the individual internally became dominant, eventually supplanting older English terms such as "passion" and "affection" as the preferred word for describing inner feelings.
This semantic evolution from public disturbance to private feeling is notable for its dramatic narrowing and inward turn. While the original Latin and Old French terms emphasized outward movement and agitation, the modern English "emotion" emphasizes the internal experience of being moved or stirred. The metaphorical logic underlying this shift is transparent and compelling: emotions are understood as forces that move a person from within, causing mental or affective agitation analogous to physical movement.
It is important to distinguish that "emotion" in English is a borrowing from French, which in turn inherited and adapted the Latin root. The English word is not an inherited cognate from Latin but a later borrowing that entered English in the early modern period. The Proto-Indo-European root *mewh₂- is the ultimate source of the Latin "movēre," but the English "emotion" itself does not descend directly from PIE; rather, it is a learned borrowing mediated through Latin and French.
Proto-Indo-European Roots
"emotion" entered English in the 16th century from French "émotion," itself derived from Old French "esmotion," which was formed on the model of Latin "ēmovēre" ("to move out"). The Latin verb combines the prefix "ē-/ex-" ("out") with "movēre" ("to move"), rooted in the Proto-Indo-European *mewh₂- ("to push away, to move"). Initially denoting public agitation or disturbance, the term's meaning shifted over the 17th and 18th centuries to signify internal feelings or mental agitation, reflecting a metaphorical inward movement. This semantic journey from external riot to private feeling represents one of the most striking examples of narrowing and internalization in English lexical history.