A lack of proper grammatical structure or correctness.

व्याकरण की कमी

English Usage: The text was considered grammarless and difficult to read.

Hindi Usage: पाठ को व्याकरण की कमी के कारण पढ़ना मुश्किल था।

Lacking grammar, especially proper structure or rules.

व्याकरणहीन

English Usage: His grammarless speech was hard to follow.

Hindi Usage: उसकी व्याकरणहीन भाषण को समझना कठिन था।