Declension table of ?gīstva

Neuter	Singular	Dual	Plural
Nominative	gīstvam	gīstve	gīstvāni
Vocative	gīstva	gīstve	gīstvāni
Accusative	gīstvam	gīstve	gīstvāni
Instrumental	gīstvena	gīstvābhyām	gīstvaiḥ
Dative	gīstvāya	gīstvābhyām	gīstvebhyaḥ
Ablative	gīstvāt	gīstvābhyām	gīstvebhyaḥ
Genitive	gīstvasya	gīstvayoḥ	gīstvānām
Locative	gīstve	gīstvayoḥ	gīstveṣu

Compound gīstva -

Adverb -gīstvam -gīstvāt