Declension table of ?copana

Masculine	Singular	Dual	Plural
Nominative	copanaḥ	copanau	copanāḥ
Vocative	copana	copanau	copanāḥ
Accusative	copanam	copanau	copanān
Instrumental	copanena	copanābhyām	copanaiḥ copanebhiḥ
Dative	copanāya	copanābhyām	copanebhyaḥ
Ablative	copanāt	copanābhyām	copanebhyaḥ
Genitive	copanasya	copanayoḥ	copanānām
Locative	copane	copanayoḥ	copaneṣu

Compound copana -

Adverb -copanam -copanāt