Declension table of ?kauṣṭhya

Masculine	Singular	Dual	Plural
Nominative	kauṣṭhyaḥ	kauṣṭhyau	kauṣṭhyāḥ
Vocative	kauṣṭhya	kauṣṭhyau	kauṣṭhyāḥ
Accusative	kauṣṭhyam	kauṣṭhyau	kauṣṭhyān
Instrumental	kauṣṭhyena	kauṣṭhyābhyām	kauṣṭhyaiḥ kauṣṭhyebhiḥ
Dative	kauṣṭhyāya	kauṣṭhyābhyām	kauṣṭhyebhyaḥ
Ablative	kauṣṭhyāt	kauṣṭhyābhyām	kauṣṭhyebhyaḥ
Genitive	kauṣṭhyasya	kauṣṭhyayoḥ	kauṣṭhyānām
Locative	kauṣṭhye	kauṣṭhyayoḥ	kauṣṭhyeṣu

Compound kauṣṭhya -

Adverb -kauṣṭhyam -kauṣṭhyāt