ungrammatical

comparative more ungrammatical · superlative most ungrammatical

1. human sciencesIn violation of one or more of the rules and conventions of a language as defined by the grammar, resulting in unacceptable or incorrect usage.

   That comment seemed to anger Ingraham, who called James’ view a “barely intelligible, not to mention ungrammatical take on President Trump.”

   2018 February 17, Devan Cole, “LeBron James: ‘I am more than an athlete’”, in CNN

   2 more examples

   My Greek is not the tongue of Homer or Aeschylus but a sloppy ungrammatical sabir lacking Attic salt and tending to a saccharinity which sets my teeth on edge.

   1985, Anthony Burgess, Kingdom of the Wicked

   While adopting the pronoun as a nonbinary description is vastly preferable for some, Merriam-Webster says, there has also been some debate that it is ungrammatical.

   2019 September 17, Kendall Trammell, “Merriam-Webster adds the nonbinary pronoun ‘they’ to its dictionary”, in CNN

   Synonyms: agrammatical, ungrammatic · Antonyms: grammatical