Meaning of (अपरिचित विषय) aparichit vishay in english

As noun :
closed book
Exampleअपरिचित विषय का हिन्दी मे अर्थ

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(अपरिचित विषय) aparichit vishay can be used as noun.No of characters: 12 including vowels consonants matras. Transliteration : aparichita viShaya