arboretum

The word 'arboretum' is a direct borrowing from Latin, where 'arbor' meant "tree". The suffix '-etum' is a Latin neuter suffix used to denote a place characterized by a specific type of plant growth, as seen in other botanical terms like 'pinetum' (a place of pines) or 'rosarium' (a place of roses). The term was adopted into scholarly and botanical English in the 18th century to describe a specialized garden for the scientific study and display of trees. Thus, the word's literal logic, "a place of trees," remains perfectly transparent in its modern, specialized meaning.

Structure: arbor (tree) + etum (place where a specific plant grows) - arbor: Latin origin, meaning "tree". Functions as the core semantic root. - etum: Latin suffix of neuter gender, indicating a place or collection of a specified thing. Functions as a locative suffix.