The word "otherwise" is an adverb with multiple meanings:
1. In a different way or manner: "She couldn't have acted otherwise."
2. In other respects: "The soup was cold, but otherwise the meal was excellent."
3. Under other circumstances: "We must hurry; otherwise we'll be late."
4. As an alternative: "Do it now. Otherwise, you'll regret it."
5. In a different state or situation: "The evidence suggests otherwise."