Declension table of ?sāvayitavya

Neuter	Singular	Dual	Plural
Nominative	sāvayitavyam	sāvayitavye	sāvayitavyāni
Vocative	sāvayitavya	sāvayitavye	sāvayitavyāni
Accusative	sāvayitavyam	sāvayitavye	sāvayitavyāni
Instrumental	sāvayitavyena	sāvayitavyābhyām	sāvayitavyaiḥ
Dative	sāvayitavyāya	sāvayitavyābhyām	sāvayitavyebhyaḥ
Ablative	sāvayitavyāt	sāvayitavyābhyām	sāvayitavyebhyaḥ
Genitive	sāvayitavyasya	sāvayitavyayoḥ	sāvayitavyānām
Locative	sāvayitavye	sāvayitavyayoḥ	sāvayitavyeṣu

Compound sāvayitavya -

Adverb -sāvayitavyam -sāvayitavyāt