The opposite of under would be above. You could also use the word top.
The opposite of under could be over or above.
The opposite word for under is above or over.
The opposite of under would be above. You could also use the word top.
Under.
under
Over!
Under achiever
The opposite is forehand (as in tennis).
The opposite number of 9 is -9. In mathematics, the opposite of a number is the same distance from zero on the number line, but in the opposite direction. This is denoted by adding a negative sign in front of the number, indicating its direction opposite to the original number.
under http://www.answers.com/topic/under
The opposite of under the counter trading
I am assuming that you mean opposite and not opposide, which is a word that is not found in the English language.The answer depends on the context for defining opposite: whether you mean additive opposite or multiplicative opposite or an opposite defined under some other criterion.