Otiosity, which means laziness or idleness, has several antonyms. Firstly, hard work or industry is an antonym to otiosity. People who are industrious do not waste time and are constantly engaged in some kind of productive activity. Secondly, diligence or perseverance is also an antonym to otiosity. Diligent people make the most of their time and put effort into achieving their goals. Thirdly, activity or vitality is an antonym to otiosity. Active individuals embrace life with enthusiasm and are always doing something. Lastly, energy or vigour is also an antonym to otiosity. People who possess energy or vigour are always motivated and have a zest for life.