Declension table of ?āpatana

Neuter	Singular	Dual	Plural
Nominative	āpatanam	āpatane	āpatanāni
Vocative	āpatana	āpatane	āpatanāni
Accusative	āpatanam	āpatane	āpatanāni
Instrumental	āpatanena	āpatanābhyām	āpatanaiḥ
Dative	āpatanāya	āpatanābhyām	āpatanebhyaḥ
Ablative	āpatanāt	āpatanābhyām	āpatanebhyaḥ
Genitive	āpatanasya	āpatanayoḥ	āpatanānām
Locative	āpatane	āpatanayoḥ	āpataneṣu

Compound āpatana -

Adverb -āpatanam -āpatanāt