HYPERCORRECT is validvalid

excessively correct [adj] : HYPERCORRECTLY [adv]

169,269 of 196,601 in NWL2023·also valid in CSW24

refers to a linguistic construction or pronunciation produced by mistaken analogy with standard usage out of a desire to be correct, such as "open widely" or "on behalf of my wife and I" [adj HYPERCORRECTLY]