Declension table of ?upāyu

Masculine	Singular	Dual	Plural
Nominative	upāyuḥ	upāyū	upāyavaḥ
Vocative	upāyo	upāyū	upāyavaḥ
Accusative	upāyum	upāyū	upāyūn
Instrumental	upāyunā	upāyubhyām	upāyubhiḥ
Dative	upāyave	upāyubhyām	upāyubhyaḥ
Ablative	upāyoḥ	upāyubhyām	upāyubhyaḥ
Genitive	upāyoḥ	upāyvoḥ	upāyūnām
Locative	upāyau	upāyvoḥ	upāyuṣu

Compound upāyu -

Adverb -upāyu