Something that is not known or familiar

अपरिचित

English Usage: The cause of the explosion remains unknown.

Hindi Usage: विस्फोट का कारण अपरिचित है।

Not known or familiar; unfamiliar

अनजान

English Usage: She felt a chill as she entered the unknown territory.

Hindi Usage: जब वह अनजान क्षेत्र में गई, तो उसे एक ठंडक महसूस हुई।

In a manner that is not known

अनविज्ञ रूप से

English Usage: She responded to the question, but her reasoning was unknown to us.

Hindi Usage: उसने सवाल का जवाब दिया, लेकिन उसकी वजह हमारे लिए अनविज्ञ थी।