Declension table of ?bṛhadgrāvan

Masculine	Singular	Dual	Plural
Nominative	bṛhadgrāvā	bṛhadgrāvāṇau	bṛhadgrāvāṇaḥ
Vocative	bṛhadgrāvan	bṛhadgrāvāṇau	bṛhadgrāvāṇaḥ
Accusative	bṛhadgrāvāṇam	bṛhadgrāvāṇau	bṛhadgrāvṇaḥ
Instrumental	bṛhadgrāvṇā	bṛhadgrāvabhyām	bṛhadgrāvabhiḥ
Dative	bṛhadgrāvṇe	bṛhadgrāvabhyām	bṛhadgrāvabhyaḥ
Ablative	bṛhadgrāvṇaḥ	bṛhadgrāvabhyām	bṛhadgrāvabhyaḥ
Genitive	bṛhadgrāvṇaḥ	bṛhadgrāvṇoḥ	bṛhadgrāvṇām
Locative	bṛhadgrāvṇi bṛhadgrāvaṇi	bṛhadgrāvṇoḥ	bṛhadgrāvasu

Compound bṛhadgrāva -

Adverb -bṛhadgrāvam