What's the opposite of dirty?
clean
What's the opposite of tall?
short
What's the opposite of wet?
dry
What's the opposite of down?
up
What's the opposite of left?
right
What's the opposite of soft?
hard
What's the opposite of loud?
quiet
What's the opposite of fast?
slow
What's the opposite of hungry?
full
What's the opposite of good?
bad
What's the opposite of easy?
difficult/hard
What's the opposite of closed?
open
What's the opposite of happy?
sad
What's the opposite of black?
white
What's the opposite of big?
small
What's the opposite of cold?
hot