The word 'Tamil' is an English adoption of the people's own name for themselves and their language, recorded in Dravidian as 'Tamil̠'. It entered English through Portuguese colonial contact in the 16th century, from the Portuguese form 'Tamil'. As a direct loanword, its form and meaning were borrowed wholesale, without analysis into constituent parts. The term thus carries the core meaning of ethnic and linguistic identity directly from its source, referring specifically to the culture, people, and language of a major Dravidian tradition centered in South India and northeastern Sri Lanka.

The word 'Tamil' is a simplex loanword. It originates from the Dravidian self-designation 'Tamil̠'. In the word's structure, it is not productively composed of smaller, independent morphemes in English.