Not known or recognized; unfamiliar

ज्ञात नहीं; अपरिचित

English Usage: The concept was unheard of in their community.

Hindi Usage: यह विचार उनके सामुदायिक में ज्ञात नहीं था।

In a way that is not heard; overlooked or ignored

ऐसा तरीका जिसमें उपेक्षित किया गया हो

English Usage: The issue was unheard of, despite its importance.

Hindi Usage: यह मुद्दा था, हालाँकि इसकी महत्वपूर्णता उपेक्षित थी।