Declension table of ?upāvasu

Masculine	Singular	Dual	Plural
Nominative	upāvasuḥ	upāvasū	upāvasavaḥ
Vocative	upāvaso	upāvasū	upāvasavaḥ
Accusative	upāvasum	upāvasū	upāvasūn
Instrumental	upāvasunā	upāvasubhyām	upāvasubhiḥ
Dative	upāvasave	upāvasubhyām	upāvasubhyaḥ
Ablative	upāvasoḥ	upāvasubhyām	upāvasubhyaḥ
Genitive	upāvasoḥ	upāvasvoḥ	upāvasūnām
Locative	upāvasau	upāvasvoḥ	upāvasuṣu

Compound upāvasu -

Adverb -upāvasu