Declension table of ?āpāna

Masculine	Singular	Dual	Plural
Nominative	āpānaḥ	āpānau	āpānāḥ
Vocative	āpāna	āpānau	āpānāḥ
Accusative	āpānam	āpānau	āpānān
Instrumental	āpānena	āpānābhyām	āpānaiḥ āpānebhiḥ
Dative	āpānāya	āpānābhyām	āpānebhyaḥ
Ablative	āpānāt	āpānābhyām	āpānebhyaḥ
Genitive	āpānasya	āpānayoḥ	āpānānām
Locative	āpāne	āpānayoḥ	āpāneṣu

Compound āpāna -

Adverb -āpānam -āpānāt