Declension table of ?sayugvan

Neuter	Singular	Dual	Plural
Nominative	sayugva	sayugvnī sayugvanī	sayugvāni
Vocative	sayugvan sayugva	sayugvnī sayugvanī	sayugvāni
Accusative	sayugva	sayugvnī sayugvanī	sayugvāni
Instrumental	sayugvanā	sayugvabhyām	sayugvabhiḥ
Dative	sayugvane	sayugvabhyām	sayugvabhyaḥ
Ablative	sayugvanaḥ	sayugvabhyām	sayugvabhyaḥ
Genitive	sayugvanaḥ	sayugvanoḥ	sayugvanām
Locative	sayugvani	sayugvanoḥ	sayugvasu

Compound sayugva -

Adverb -sayugva -sayugvam