Declension table of ?prārthayitavya

Neuter	Singular	Dual	Plural
Nominative	prārthayitavyam	prārthayitavye	prārthayitavyāni
Vocative	prārthayitavya	prārthayitavye	prārthayitavyāni
Accusative	prārthayitavyam	prārthayitavye	prārthayitavyāni
Instrumental	prārthayitavyena	prārthayitavyābhyām	prārthayitavyaiḥ
Dative	prārthayitavyāya	prārthayitavyābhyām	prārthayitavyebhyaḥ
Ablative	prārthayitavyāt	prārthayitavyābhyām	prārthayitavyebhyaḥ
Genitive	prārthayitavyasya	prārthayitavyayoḥ	prārthayitavyānām
Locative	prārthayitavye	prārthayitavyayoḥ	prārthayitavyeṣu

Compound prārthayitavya -

Adverb -prārthayitavyam -prārthayitavyāt