Declension table of ?kopanaka

Neuter	Singular	Dual	Plural
Nominative	kopanakam	kopanake	kopanakāni
Vocative	kopanaka	kopanake	kopanakāni
Accusative	kopanakam	kopanake	kopanakāni
Instrumental	kopanakena	kopanakābhyām	kopanakaiḥ
Dative	kopanakāya	kopanakābhyām	kopanakebhyaḥ
Ablative	kopanakāt	kopanakābhyām	kopanakebhyaḥ
Genitive	kopanakasya	kopanakayoḥ	kopanakānām
Locative	kopanake	kopanakayoḥ	kopanakeṣu

Compound kopanaka -

Adverb -kopanakam -kopanakāt