Sentence:  The chief frontier tribes on the border are the cis-Indus <WSD>Swatis</WSD>, Hassanzais, Akazais, Chagarzais, Pariari Syads, Madda Khels, Amazais and Umarzais. 
Meaning of the word marked with <WSD> tags:  A Pashtun tribe (clan of Eousafzai or Yousafzai) of northern Pakistan, originally migrating from the Sarawat Mountains, now residing around the Swat Valley.