Declension table of ?prasthika

Neuter	Singular	Dual	Plural
Nominative	prasthikam	prasthike	prasthikāni
Vocative	prasthika	prasthike	prasthikāni
Accusative	prasthikam	prasthike	prasthikāni
Instrumental	prasthikena	prasthikābhyām	prasthikaiḥ
Dative	prasthikāya	prasthikābhyām	prasthikebhyaḥ
Ablative	prasthikāt	prasthikābhyām	prasthikebhyaḥ
Genitive	prasthikasya	prasthikayoḥ	prasthikānām
Locative	prasthike	prasthikayoḥ	prasthikeṣu

Compound prasthika -

Adverb -prasthikam -prasthikāt