Declension table of ?yūpaka

Masculine	Singular	Dual	Plural
Nominative	yūpakaḥ	yūpakau	yūpakāḥ
Vocative	yūpaka	yūpakau	yūpakāḥ
Accusative	yūpakam	yūpakau	yūpakān
Instrumental	yūpakena	yūpakābhyām	yūpakaiḥ yūpakebhiḥ
Dative	yūpakāya	yūpakābhyām	yūpakebhyaḥ
Ablative	yūpakāt	yūpakābhyām	yūpakebhyaḥ
Genitive	yūpakasya	yūpakayoḥ	yūpakānām
Locative	yūpake	yūpakayoḥ	yūpakeṣu

Compound yūpaka -

Adverb -yūpakam -yūpakāt