Declension table of ?bṛhaduktha

Neuter	Singular	Dual	Plural
Nominative	bṛhaduktham	bṛhadukthe	bṛhadukthāni
Vocative	bṛhaduktha	bṛhadukthe	bṛhadukthāni
Accusative	bṛhaduktham	bṛhadukthe	bṛhadukthāni
Instrumental	bṛhadukthena	bṛhadukthābhyām	bṛhadukthaiḥ
Dative	bṛhadukthāya	bṛhadukthābhyām	bṛhadukthebhyaḥ
Ablative	bṛhadukthāt	bṛhadukthābhyām	bṛhadukthebhyaḥ
Genitive	bṛhadukthasya	bṛhadukthayoḥ	bṛhadukthānām
Locative	bṛhadukthe	bṛhadukthayoḥ	bṛhaduktheṣu

Compound bṛhaduktha -

Adverb -bṛhaduktham -bṛhadukthāt