Un
Not tie
Untie
Untie your shoe.
Bad practice
Malpractice
The lawyer was sued for malpractice.
Does not exsist
nonexsistant
Aliens are nonexsistant.
To visit again
Revisit
We often revisit the lake in the summer.
The opposite of appear
Disappear
The magician made the rabbit disappear.
Not healthy
Unhealthy
Candy is an unhealthy choice.
Bad function
Malfunction
A computer malfunction was the cause of the problem.
Not fiction
Nonfiction
Biographies are nonfiction books.
To build again
Rebuild
The boy had to rebuild his castle because it fell over.
Opposite of honest
Dishonest
When the child broke the window he was dishonest and said it wasn't him.
Not aware
unaware
I was unaware of the problem at recess.
Bad nutrition
Malnutrition
Children die everyday from malnutrition.
Not worried about anything
Nonchalant
He is nonchalant on the weekends.
To play again
Replay
Can you please replay my favorite song?
Opposite of like
Dislike
I dislike running because it hurts my knees.
Not lucky
unlucky
She was unlucky when she got bit by the snake.
Badly nourished
malnourished
Children in Gaza are malnourished from the lack of food.
Not spoilable
Nonperishable
The nonperishable foods are in the pantry.
To go back
Return
I will return to the haunted house this year.
Opposite of connected
Disconnected
Her cellphone was disconnected because the bill wasn't paid.
Not washable
Unwashable
My shirt is wool and is unwashable.
Bad will towards other
Malevolent
She saw the glint of dark, malevolent eyes in the woods.
Not interesting
Nondescript
He always wears the same nondescript clothes.
To arrange again
Rearrange
My mom didn't like the way the living room looked so we had to rearrange the furniture.
Opposite of advantage
Disadvantage
The team was at a disadvantage when one player got hurt.