Declension table of ?siddhārthaka

Neuter	Singular	Dual	Plural
Nominative	siddhārthakam	siddhārthake	siddhārthakāni
Vocative	siddhārthaka	siddhārthake	siddhārthakāni
Accusative	siddhārthakam	siddhārthake	siddhārthakāni
Instrumental	siddhārthakena	siddhārthakābhyām	siddhārthakaiḥ
Dative	siddhārthakāya	siddhārthakābhyām	siddhārthakebhyaḥ
Ablative	siddhārthakāt	siddhārthakābhyām	siddhārthakebhyaḥ
Genitive	siddhārthakasya	siddhārthakayoḥ	siddhārthakānām
Locative	siddhārthake	siddhārthakayoḥ	siddhārthakeṣu

Compound siddhārthaka -

Adverb -siddhārthakam -siddhārthakāt