Through vs. Thorough
What Is Their Main Difference?
They are only similar in that they can both be adjectives However, 'through' means moving in something and going out from its other side, whereas, 'thorough' indicates doing something completely.
Differences
'Through' indicates going in something like a door, an opening, a gate, etc., and moving out of it from the other side. Look at the examples below:
Jimmy rushed through the crowd and caught her arm.
I think she just disappeared through the wall.
'Thorough' has the same meaning as 'completely'. Look at the following examples:
A thorough investigation is needed in this case.
After having conducted thorough inspections, we have decided to announce our conclusions.
Similarities
They can both be adjectives. Look below:
She suddenly screamed: 'I'm through.'
We will provide a thorough and a detailed analysis of our current situation.
Are They Interchangeable?
As it was clear above, they can never be used interchangeably. One indicates being 'complete', whereas, the other one means to finish or to move into something. Compare:
✓ She moved through the crowd proudly.
X She moved thorough the crowd proudly.
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