Declension table of ?śaktavya

Neuter	Singular	Dual	Plural
Nominative	śaktavyam	śaktavye	śaktavyāni
Vocative	śaktavya	śaktavye	śaktavyāni
Accusative	śaktavyam	śaktavye	śaktavyāni
Instrumental	śaktavyena	śaktavyābhyām	śaktavyaiḥ
Dative	śaktavyāya	śaktavyābhyām	śaktavyebhyaḥ
Ablative	śaktavyāt	śaktavyābhyām	śaktavyebhyaḥ
Genitive	śaktavyasya	śaktavyayoḥ	śaktavyānām
Locative	śaktavye	śaktavyayoḥ	śaktavyeṣu

Compound śaktavya -

Adverb -śaktavyam -śaktavyāt