Declension table of ?avapatana

Neuter	Singular	Dual	Plural
Nominative	avapatanam	avapatane	avapatanāni
Vocative	avapatana	avapatane	avapatanāni
Accusative	avapatanam	avapatane	avapatanāni
Instrumental	avapatanena	avapatanābhyām	avapatanaiḥ
Dative	avapatanāya	avapatanābhyām	avapatanebhyaḥ
Ablative	avapatanāt	avapatanābhyām	avapatanebhyaḥ
Genitive	avapatanasya	avapatanayoḥ	avapatanānām
Locative	avapatane	avapatanayoḥ	avapataneṣu

Compound avapatana -

Adverb -avapatanam -avapatanāt