n. pl. Swahili or Swa·hi·lis
1. A Bantu language of the coast and islands of eastern Africa from Somalia to Mozambique. It is an official language of Tanzania and is widely used as a lingua franca in eastern and east-central Africa. Also called Kiswahili.
2. An inhabitant of coastal eastern Africa for whom Swahili is the mother tongue.
[Swahili, from Arabic sawāḥilī, of the coasts, from sawāḥil, pl. of sāḥil, coast, active participle of saḥala, to scrape off, smooth; see šḥl in the Appendix of Semitic roots.]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.