Only one spelling follows standard rules.
Incorrect spelling - "Thouroughly" is incorrect.
"thouroughly" is a common misspelling of "thoroughly". Always use "thoroughly" when referring to the correct word.
Correct spelling - The proper way to spell this word.
"Thoroughly" means completely or carefully.
"thoroughly": "Thoroughly" means completely or carefully.
This word is commonly used in everyday conversation and writing.
"Correct:" Review thoroughly.
"Correct:" Wash thoroughly.
"Incorrect:" Review thouroughly.
"Incorrect:" Wash thouroughly.
A: No.
Thoroughly is the correct spelling for the adverb form of thorough. Thouroughly is an incorrect variant with extra letters. Correct usage is important for clarity, particularly in instructions, guides, and formal writing.