The Swahili word safari means journey, originally from the Arabic سفر (safar) meaning a journey; the verb for "to travel" in Swahili is kusafiri. These words are used for any type of journey, e.g. by bus from Nairobi to Mombasa or by ferry from Dar es Salaam to Unguja. Safari entered the English language at the end of the 1850s thanks to Richard Francis Burton, the famous explorer.

The Regimental March of the King's African Rifles was 'Funga Safari', literally 'tie up the March', or, in other words, pack up equipment ready to march.

More Info: en.wikipedia.org