Declension table of apsu

Masculine	Singular	Dual	Plural
Nominative	apsuḥ	apsū	apsavaḥ
Vocative	apso	apsū	apsavaḥ
Accusative	apsum	apsū	apsūn
Instrumental	apsunā	apsubhyām	apsubhiḥ
Dative	apsave	apsubhyām	apsubhyaḥ
Ablative	apsoḥ	apsubhyām	apsubhyaḥ
Genitive	apsoḥ	apsvoḥ	apsūnām
Locative	apsau	apsvoḥ	apsuṣu

Compound apsu -

Adverb -apsu