Declension table of apathya

Neuter	Singular	Dual	Plural
Nominative	apathyam	apathye	apathyāni
Vocative	apathya	apathye	apathyāni
Accusative	apathyam	apathye	apathyāni
Instrumental	apathyena	apathyābhyām	apathyaiḥ
Dative	apathyāya	apathyābhyām	apathyebhyaḥ
Ablative	apathyāt	apathyābhyām	apathyebhyaḥ
Genitive	apathyasya	apathyayoḥ	apathyānām
Locative	apathye	apathyayoḥ	apathyeṣu

Compound apathya -

Adverb -apathyam -apathyāt