An antonym for tidy:

The correct answer is: Messy

Messy is the opposite of the word 'tidy'. Tidy means, keeping clean. It can mean anything which is neat, clear and hygiene. Making ourselves hygiene is also a quality of tidyness. But messy means, making everything dirt. Not keeping clean and in an arranged manner is called as messy. Messy is a negative word which denotes the quality of someone's habit or denotes the situation around the person.