Declension table of ?śantva

Neuter	Singular	Dual	Plural
Nominative	śantvam	śantve	śantvāni
Vocative	śantva	śantve	śantvāni
Accusative	śantvam	śantve	śantvāni
Instrumental	śantvena	śantvābhyām	śantvaiḥ
Dative	śantvāya	śantvābhyām	śantvebhyaḥ
Ablative	śantvāt	śantvābhyām	śantvebhyaḥ
Genitive	śantvasya	śantvayoḥ	śantvānām
Locative	śantve	śantvayoḥ	śantveṣu

Compound śantva -

Adverb -śantvam -śantvāt