Declension table of ?sotavya

Neuter	Singular	Dual	Plural
Nominative	sotavyam	sotavye	sotavyāni
Vocative	sotavya	sotavye	sotavyāni
Accusative	sotavyam	sotavye	sotavyāni
Instrumental	sotavyena	sotavyābhyām	sotavyaiḥ
Dative	sotavyāya	sotavyābhyām	sotavyebhyaḥ
Ablative	sotavyāt	sotavyābhyām	sotavyebhyaḥ
Genitive	sotavyasya	sotavyayoḥ	sotavyānām
Locative	sotavye	sotavyayoḥ	sotavyeṣu

Compound sotavya -

Adverb -sotavyam -sotavyāt