Declension table of ātapatra

Neuter	Singular	Dual	Plural
Nominative	ātapatram	ātapatre	ātapatrāṇi
Vocative	ātapatra	ātapatre	ātapatrāṇi
Accusative	ātapatram	ātapatre	ātapatrāṇi
Instrumental	ātapatreṇa	ātapatrābhyām	ātapatraiḥ
Dative	ātapatrāya	ātapatrābhyām	ātapatrebhyaḥ
Ablative	ātapatrāt	ātapatrābhyām	ātapatrebhyaḥ
Genitive	ātapatrasya	ātapatrayoḥ	ātapatrāṇām
Locative	ātapatre	ātapatrayoḥ	ātapatreṣu

Compound ātapatra -

Adverb -ātapatram -ātapatrāt