Declension table of ?sausthya

Neuter	Singular	Dual	Plural
Nominative	sausthyam	sausthye	sausthyāni
Vocative	sausthya	sausthye	sausthyāni
Accusative	sausthyam	sausthye	sausthyāni
Instrumental	sausthyena	sausthyābhyām	sausthyaiḥ
Dative	sausthyāya	sausthyābhyām	sausthyebhyaḥ
Ablative	sausthyāt	sausthyābhyām	sausthyebhyaḥ
Genitive	sausthyasya	sausthyayoḥ	sausthyānām
Locative	sausthye	sausthyayoḥ	sausthyeṣu

Compound sausthya -

Adverb -sausthyam -sausthyāt