Declension table of ?upahasvan

Masculine	Singular	Dual	Plural
Nominative	upahasvā	upahasvānau	upahasvānaḥ
Vocative	upahasvan	upahasvānau	upahasvānaḥ
Accusative	upahasvānam	upahasvānau	upahasvanaḥ
Instrumental	upahasvanā	upahasvabhyām	upahasvabhiḥ
Dative	upahasvane	upahasvabhyām	upahasvabhyaḥ
Ablative	upahasvanaḥ	upahasvabhyām	upahasvabhyaḥ
Genitive	upahasvanaḥ	upahasvanoḥ	upahasvanām
Locative	upahasvani	upahasvanoḥ	upahasvasu

Compound upahasva -

Adverb -upahasvam