1. [n]  the dialect of Sotho spoken by the Tswana people in Botswana
2. [n]  a member of a Bantu people living chiefly in Botswana and western South Africa
3. [adj]  of or relating to a dialect of Sotho or the Bantu people who speak it; "Tswana vowels"

TSWANA is a 6 letter word that starts with T.