Declension table of ?śacitavya

Neuter	Singular	Dual	Plural
Nominative	śacitavyam	śacitavye	śacitavyāni
Vocative	śacitavya	śacitavye	śacitavyāni
Accusative	śacitavyam	śacitavye	śacitavyāni
Instrumental	śacitavyena	śacitavyābhyām	śacitavyaiḥ
Dative	śacitavyāya	śacitavyābhyām	śacitavyebhyaḥ
Ablative	śacitavyāt	śacitavyābhyām	śacitavyebhyaḥ
Genitive	śacitavyasya	śacitavyayoḥ	śacitavyānām
Locative	śacitavye	śacitavyayoḥ	śacitavyeṣu

Compound śacitavya -

Adverb -śacitavyam -śacitavyāt