Declension table of ?apsava

Neuter	Singular	Dual	Plural
Nominative	apsavam	apsave	apsavāni
Vocative	apsava	apsave	apsavāni
Accusative	apsavam	apsave	apsavāni
Instrumental	apsavena	apsavābhyām	apsavaiḥ
Dative	apsavāya	apsavābhyām	apsavebhyaḥ
Ablative	apsavāt	apsavābhyām	apsavebhyaḥ
Genitive	apsavasya	apsavayoḥ	apsavānām
Locative	apsave	apsavayoḥ	apsaveṣu

Compound apsava -

Adverb -apsavam -apsavāt