Declension table of ?śāntayitavya

Neuter	Singular	Dual	Plural
Nominative	śāntayitavyam	śāntayitavye	śāntayitavyāni
Vocative	śāntayitavya	śāntayitavye	śāntayitavyāni
Accusative	śāntayitavyam	śāntayitavye	śāntayitavyāni
Instrumental	śāntayitavyena	śāntayitavyābhyām	śāntayitavyaiḥ
Dative	śāntayitavyāya	śāntayitavyābhyām	śāntayitavyebhyaḥ
Ablative	śāntayitavyāt	śāntayitavyābhyām	śāntayitavyebhyaḥ
Genitive	śāntayitavyasya	śāntayitavyayoḥ	śāntayitavyānām
Locative	śāntayitavye	śāntayitavyayoḥ	śāntayitavyeṣu

Compound śāntayitavya -

Adverb -śāntayitavyam -śāntayitavyāt