Correct spelling, explanation: the word middle is based on Old English middel. The last two letters exchanged places, as it was more suitable to newer, standardized spelling, but the core of the word – which usually are the consonants – became unchanged. Because of this, nowadays we spell middle as we do.

Definition of middle:
noun
1. the point located between others, usually in equal distance from the different points
In the middle of the garden, there was a nice round pond.
adjective
1. being between something, usually in equal distance to the other points
The middle part of the game was not too exciting, but they scored a winning goal at the last minute.

Idioms with middle:
The middle of nowhere – a very secluded place, far from cities and civilization
I went to my grandparents for two weeks in the summer – they live in the middle of nowhere; no shops, no Internet, only fields and cows!
To be a middle man – to be a person who (usually unwillingly) has to be the diplomat in a conflict
When my parents were fighting I was often made to be a middleman to help them get to makeup.

Incorrect spelling, explanation: the Old English version of this word is middel. Now, based on the pronunciation the spelling midle with only one d might be explained, but when we wonder about the proper spelling, we need to take the origins of the word into consideration. In this case, we have to spell the word middle based on its origins.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling