There is no way to 'defy' the law of gravity. If you want to move up instead
of down, then you need to come up with enough upward force somehow to
win out over gravity. You do that with your leg muscles every time you walk
up stairs. Many people do it by managing buoyant force when they float an
aluminum canoe or a steel battleship. And other folks do it with a propane
burner when they fly a hot-air balloon. If you're short on hot air, you can
even do it with a party balloon and some helium in it.
None of these schemes "defies" gravity. That's circus talk. We just know how
to do what it takes, occasionally, to pull hard enough against gravity that we
win for a while.
The word you may be asking about is spelled "defy".
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern --DIFY. That is, six letter words with 3rd letter D and 4th letter I and 5th letter F and 6th letter Y. In alphabetical order, they are: codify ladify modify nidify
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern L-DIFY. That is, six letter words with 1st letter L and 3rd letter D and 4th letter I and 5th letter F and 6th letter Y. In alphabetical order, they are: ladify
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern D--DIFY. That is, seven letter words with 1st letter D and 4th letter D and 5th letter I and 6th letter F and 7th letter Y. In alphabetical order, they are: dandify