Declension table of ?kupathya

Neuter	Singular	Dual	Plural
Nominative	kupathyam	kupathye	kupathyāni
Vocative	kupathya	kupathye	kupathyāni
Accusative	kupathyam	kupathye	kupathyāni
Instrumental	kupathyena	kupathyābhyām	kupathyaiḥ
Dative	kupathyāya	kupathyābhyām	kupathyebhyaḥ
Ablative	kupathyāt	kupathyābhyām	kupathyebhyaḥ
Genitive	kupathyasya	kupathyayoḥ	kupathyānām
Locative	kupathye	kupathyayoḥ	kupathyeṣu

Compound kupathya -

Adverb -kupathyam -kupathyāt