The word "in spirited" means to be lively, energetic, or full of spirit. The antonyms for this word can be dull, lifeless, lethargic, unenthusiastic, and spiritless. These words indicate a lack of energy, enthusiasm, and motivation. When something is uninspiring, it fails to evoke strong feelings or excitement in people. A dull workplace, for example, can negatively affect motivation and productivity. If you feel lifeless and lethargic, you may need to incorporate some exercise or healthy habits into your routine. In short, antonyms for "in spirited" describe a state of being that lacks energy, enthusiasm, and vigor, and can hinder productivity and motivation.