1. 1  a prefix meaning ânot,â freely used as an English formative, giving negative or opposite force in adjectives and their derivative adverbs and nouns (unfair; unfairly; unfairness; unfelt; unseen; unfitting; unformed; unheard-of; un-get-at-able), and less freely used in certain other nouns (unrest; unemployment). 1  Compare un-2 .
On August 7, 1998, at approximately 10:30 a.m. local time, two Embassies of the United States of America, located in the East African cities of Nairobi, Kenya and Dar es Salaam, Tanzania, were attacked in coordinated truck bombings, later determined to have occurred approximately four minutes apart.
The episode was one of several irritants in U.S.-Ethiopian relations after Ethiopia's December 2006 invasion of Somalia. Others included revelations in the U.S. press about AC-130 gunship missions being flown out of Ethiopia and a general reluctance on the Ethiopians' part to cooperate too closely with U.S. forces in Somalia.