The word 'typecast' is a modern compound formed from two distinct English words. 'Type' has a long history, tracing back to the Greek typos, which originally meant a blow or the mark left by a blow, evolving through Latin to signify a figure, model, or kind. 'Cast' entered English from Old Norse, meaning to throw. In the theatrical context, 'to cast' came to mean to assign actors to roles, as if throwing them into parts. The compound 'typecast' logically combines these ideas: to assign (cast) an actor repeatedly to a specific category or model (type) of role, a concept which later extended metaphorically to any rigid categorization.

Structure: type (kind, model) + cast (assign a role) - type: From Latin typus, from Greek typos (blow, impression, model). In this word, it functions as the core concept of a category or model. - cast: From Old Norse kasta (to throw). In this word, it functions as a verb meaning to assign or allocate roles.