Declension table of ?yāpaka

Masculine	Singular	Dual	Plural
Nominative	yāpakaḥ	yāpakau	yāpakāḥ
Vocative	yāpaka	yāpakau	yāpakāḥ
Accusative	yāpakam	yāpakau	yāpakān
Instrumental	yāpakena	yāpakābhyām	yāpakaiḥ yāpakebhiḥ
Dative	yāpakāya	yāpakābhyām	yāpakebhyaḥ
Ablative	yāpakāt	yāpakābhyām	yāpakebhyaḥ
Genitive	yāpakasya	yāpakayoḥ	yāpakānām
Locative	yāpake	yāpakayoḥ	yāpakeṣu

Compound yāpaka -

Adverb -yāpakam -yāpakāt