The trouble with the dictionary is that you have to know how a word is spelled before you can look it up to see how it is spelled.

Impossibility is a dictionary word.

Take care that you never spell a word wrong. Always before you write a word, consider how it is spelled, and, if you do not remember, turn to a dictionary. It produces great praise to a lady to spell well. to his daughter Martha

For me there is no such word as 'luck' in the dictionary.

The word impossible is not in my dictionary.

We all make mistakes, but intelligence enables us to do it on purpose.