Declension table of ?prasmartavya

Neuter	Singular	Dual	Plural
Nominative	prasmartavyam	prasmartavye	prasmartavyāni
Vocative	prasmartavya	prasmartavye	prasmartavyāni
Accusative	prasmartavyam	prasmartavye	prasmartavyāni
Instrumental	prasmartavyena	prasmartavyābhyām	prasmartavyaiḥ
Dative	prasmartavyāya	prasmartavyābhyām	prasmartavyebhyaḥ
Ablative	prasmartavyāt	prasmartavyābhyām	prasmartavyebhyaḥ
Genitive	prasmartavyasya	prasmartavyayoḥ	prasmartavyānām
Locative	prasmartavye	prasmartavyayoḥ	prasmartavyeṣu

Compound prasmartavya -

Adverb -prasmartavyam -prasmartavyāt