ungrammatical

adj.

不符合语法的，违反语法规则的；

1. The essay is ungrammatical and incoherent.
   文章写得文理不通。

Semantic annotation of unstructured and ungrammatical text
Processing Polarity: How the Ungrammatical Intrudes on the Grammatical
Parental responses to grammatical and ungrammatical child utterances.
What preschool children do and do not do with ungrammatical word orders
Brown & Hanlon revisited: Mothers' sensitivity to ungrammatical forms.
Creating relational data from unstructured and ungrammatical data sources
Brown & Hanlon Revisisted: Mother's Sensitivity to Ungrammatical Forms.
Brown and Hanlon revisited : Mothers' sensitivity to ungrammatical morpheme acquisition
Memory Limitations and Structural Forgetting: The Perception of Complex Ungrammatical Sentences as Grammatical
Electrophysiological evidence for serial sentence processing: a comparison between non-preferred and ungrammatical continuations ☆