What's the opposite of up?
down
What's the opposite of clean?
Dirty
What's the opposite of wet?
dry
What's the opposite of new?
Old
What's the opposite of noisy?
Quiet
What's the opposite of hello?
Goodbye
What's the opposite of cold?
Hot
What's the opposite of stop?
Go
What's the opposite of happy?
sad
What's the opposite of yes?
No