1. makes something dirty with mud or a muddy substance
Usage: third person singular present tense of ‘muddy’
2. makes something unclear, confused, or difficult to understand
Usage: figurative use

Examples

• The rain muddies the hiking trail every spring.
• She muddies her boots walking through the garden.
• His explanation only muddies the issue further.
• The politician muddies the debate with irrelevant details.
• The dog muddies the kitchen floor with its paws.
• Adding too many characters muddies the plot of the story.