The history of emotions is notably fraught with semantic anxiety, and a great deal of ink has been spilt in attempts to clarify emotion terminology, with respect to both historical and contemporary usage. Because the 16th century is both a momentous time of linguistic change for European languages, and often for some reason neglected by historians of emotion trying to tell a longer story about emotion terminology, this article provides an overview of how 16th-century lexicons and prominent humanist authors handle (...) the basic Latin emotion terms affectus and passio. It suggests further that 16th-century usage confounds Thomas Dixon’s assertion that “classical Christian” usage consists of a generally firm distinction between the two terms. (shrink)