Declension table of ?bṛhattva

Neuter	Singular	Dual	Plural
Nominative	bṛhattvam	bṛhattve	bṛhattvāni
Vocative	bṛhattva	bṛhattve	bṛhattvāni
Accusative	bṛhattvam	bṛhattve	bṛhattvāni
Instrumental	bṛhattvena	bṛhattvābhyām	bṛhattvaiḥ
Dative	bṛhattvāya	bṛhattvābhyām	bṛhattvebhyaḥ
Ablative	bṛhattvāt	bṛhattvābhyām	bṛhattvebhyaḥ
Genitive	bṛhattvasya	bṛhattvayoḥ	bṛhattvānām
Locative	bṛhattve	bṛhattvayoḥ	bṛhattveṣu

Compound bṛhattva -

Adverb -bṛhattvam -bṛhattvāt