in an incorrect manner
"to credit Lister with the first formulation of the basic principle of stratigraphy would be to bestow credit falsely"
in an inaccurate manner
"he decided to reveal the details only after other sources had reported them incorrectly"
"she guessed wrong"
In an incorrect manner.
"He incorrectly assembled the furniture, putting all the screws in the wrong holes."
Incorrectly is formed by adding the suffix "-ly" to the word incorrect, creating an adverb that means not done properly. The root word incorrect itself comes from Latin and originally meant "not right."