Declension table of siddhāyatana

Neuter	Singular	Dual	Plural
Nominative	siddhāyatanam	siddhāyatane	siddhāyatanāni
Vocative	siddhāyatana	siddhāyatane	siddhāyatanāni
Accusative	siddhāyatanam	siddhāyatane	siddhāyatanāni
Instrumental	siddhāyatanena	siddhāyatanābhyām	siddhāyatanaiḥ
Dative	siddhāyatanāya	siddhāyatanābhyām	siddhāyatanebhyaḥ
Ablative	siddhāyatanāt	siddhāyatanābhyām	siddhāyatanebhyaḥ
Genitive	siddhāyatanasya	siddhāyatanayoḥ	siddhāyatanānām
Locative	siddhāyatane	siddhāyatanayoḥ	siddhāyataneṣu

Compound siddhāyatana -

Adverb -siddhāyatanam -siddhāyatanāt