The word demotivate means to lessen or reduce someone's motivation. Antonyms for this word would be words that have the opposite meaning and would, therefore, increase motivation, such as encourage, inspire, invigorate, motivate, incite, stimulate, or uplift. Encouragement could be given to someone who is demotivated to fill them with hope and faith, which can help them to find inspiration and motivation in their work or personal life. When people are feeling demotivated, it helps to motivate them by reminding them of their goals and by giving them words of encouragement. This can help them to gain momentum and find renewed passion and enthusiasm for their daily tasks.