Read the passage and write the antonym or synonym of the words as directed below:

Sincerity is the root of success of all work. One can go a long way if he does a job with sincerity. The great men are sincere because they know that sincerity is the key to success. Those who do not follow the rules of sincerity can never go a long way. Sincerity is the secret of victory. If any work is not done with sincerity, one will never receive desirable output from it. So, we should be sincere in every walk of life.