Declension table of ?upasthāyuka

Neuter	Singular	Dual	Plural
Nominative	upasthāyukam	upasthāyuke	upasthāyukāni
Vocative	upasthāyuka	upasthāyuke	upasthāyukāni
Accusative	upasthāyukam	upasthāyuke	upasthāyukāni
Instrumental	upasthāyukena	upasthāyukābhyām	upasthāyukaiḥ
Dative	upasthāyukāya	upasthāyukābhyām	upasthāyukebhyaḥ
Ablative	upasthāyukāt	upasthāyukābhyām	upasthāyukebhyaḥ
Genitive	upasthāyukasya	upasthāyukayoḥ	upasthāyukānām
Locative	upasthāyuke	upasthāyukayoḥ	upasthāyukeṣu

Compound upasthāyuka -

Adverb -upasthāyukam -upasthāyukāt