The term 'Aikido' is created by the grouping of three characters in the Japanese language. 'Ai', which signifies 'joining'; 'ki', which means 'spirit' and 'do', which means 'way'. These three words actually encapsulate the essence of Aikido as a sort of martial art: 'the joining of the spirit to find the way'. It was only in the period from 1930's to the 1940's that the name Aikido was formally accepted as the name of this martial art variety.