Easily or effectively used; convenient or useful, Easy to manage or handle Used of a ship, Easy to use, useful, noun_ United States blues musician who transcribed and published traditional blues music (1873-1958)

with efficiency; in an efficient manner, With effect; effectively

in an effective manner, in actuality or reality or fact, With effect; powerfully; completely; thoroughly

The ability or capacity to act or do something effectively, The military strength or economic or political influence of a nation or other group, The capacity of a system or machine to operate, adjective_ Of or relating to political, social, or economic control, Of or relating to the generation or transmission of electricity, Operated with mechanical or electrical energy in place of bodily exertion, transitive verb_ To supply with power, especially mechanical or electrical power