The Correct spelling is: thorough
Common misspellings of the word thorough are:
How do you spell thorough?. It is not throrough
prep. & adv. Archaic.
- Exhaustively complete: a thorough search.
- Painstakingly accurate or careful: thorough research.
- Absolute; utter: a thorough pleasure.
Variant of through.
[Middle English thorow, through, thorough, from Old English thuruh, from end to end, through.]thoroughly thor'oughÂ·ly adv.
thoroughness thor'oughÂ·ness n.