Not significant or worthy of attention.

महत्वहीन

English Usage: The unimportant details were overlooked in the report.

Hindi Usage: रिपोर्ट में महत्वहीन विवरणों को नजरअंदाज कर दिया गया।

In a manner that does not hold significance or value.

बिना महत्व के

English Usage: She treated the topic unimportantly during the discussion.

Hindi Usage: उसने चर्चा के दौरान विषय को बिना महत्व के扱 किया।