Declension table of ?panthayitavya

Neuter	Singular	Dual	Plural
Nominative	panthayitavyam	panthayitavye	panthayitavyāni
Vocative	panthayitavya	panthayitavye	panthayitavyāni
Accusative	panthayitavyam	panthayitavye	panthayitavyāni
Instrumental	panthayitavyena	panthayitavyābhyām	panthayitavyaiḥ
Dative	panthayitavyāya	panthayitavyābhyām	panthayitavyebhyaḥ
Ablative	panthayitavyāt	panthayitavyābhyām	panthayitavyebhyaḥ
Genitive	panthayitavyasya	panthayitavyayoḥ	panthayitavyānām
Locative	panthayitavye	panthayitavyayoḥ	panthayitavyeṣu

Compound panthayitavya -

Adverb -panthayitavyam -panthayitavyāt