Declension table of ?upadhvasta

Neuter	Singular	Dual	Plural
Nominative	upadhvastam	upadhvaste	upadhvastāni
Vocative	upadhvasta	upadhvaste	upadhvastāni
Accusative	upadhvastam	upadhvaste	upadhvastāni
Instrumental	upadhvastena	upadhvastābhyām	upadhvastaiḥ
Dative	upadhvastāya	upadhvastābhyām	upadhvastebhyaḥ
Ablative	upadhvastāt	upadhvastābhyām	upadhvastebhyaḥ
Genitive	upadhvastasya	upadhvastayoḥ	upadhvastānām
Locative	upadhvaste	upadhvastayoḥ	upadhvasteṣu

Compound upadhvasta -

Adverb -upadhvastam -upadhvastāt