Declension table of ?copya

Masculine	Singular	Dual	Plural
Nominative	copyaḥ	copyau	copyāḥ
Vocative	copya	copyau	copyāḥ
Accusative	copyam	copyau	copyān
Instrumental	copyena	copyābhyām	copyaiḥ copyebhiḥ
Dative	copyāya	copyābhyām	copyebhyaḥ
Ablative	copyāt	copyābhyām	copyebhyaḥ
Genitive	copyasya	copyayoḥ	copyānām
Locative	copye	copyayoḥ	copyeṣu

Compound copya -

Adverb -copyam -copyāt