Declension table of apatha

Masculine	Singular	Dual	Plural
Nominative	apathaḥ	apathau	apathāḥ
Vocative	apatha	apathau	apathāḥ
Accusative	apatham	apathau	apathān
Instrumental	apathena	apathābhyām	apathaiḥ apathebhiḥ
Dative	apathāya	apathābhyām	apathebhyaḥ
Ablative	apathāt	apathābhyām	apathebhyaḥ
Genitive	apathasya	apathayoḥ	apathānām
Locative	apathe	apathayoḥ	apatheṣu

Compound apatha -

Adverb -apatham -apathāt