The word 'tobacconist' is built upon the core noun 'tobacco', a loanword from the New World. The Spanish 'tabaco' was borrowed from the Arawakan languages of the Caribbean, where it referred to the rolled leaves used for smoking or the pipe itself. Upon entering English, the noun 'tobacco' was combined with the agentive suffix '-ist', which originates from Greek '-istes' via Latin and French, signifying a person associated with a specific practice or thing. A euphonic 'n' was inserted to bridge the two elements, creating a term that logically denotes "a person concerned with tobacco," specifically a retailer. Thus, a word with indigenous American roots was grammatically formalized in English using a classical suffix to define a commercial profession.

Structure: tobacco + n + ist - tobacco (noun): From Spanish 'tabaco', of Arawakan (Taino) origin, referring to the plant or its leaves. - n (connective): A common linking consonant added for euphony. - ist (noun suffix): From Greek '-istes' via Latin and French, denoting a person who practices or is concerned with something.