Declension table of sthirasukha

Neuter	Singular	Dual	Plural
Nominative	sthirasukham	sthirasukhe	sthirasukhāni
Vocative	sthirasukha	sthirasukhe	sthirasukhāni
Accusative	sthirasukham	sthirasukhe	sthirasukhāni
Instrumental	sthirasukhena	sthirasukhābhyām	sthirasukhaiḥ
Dative	sthirasukhāya	sthirasukhābhyām	sthirasukhebhyaḥ
Ablative	sthirasukhāt	sthirasukhābhyām	sthirasukhebhyaḥ
Genitive	sthirasukhasya	sthirasukhayoḥ	sthirasukhānām
Locative	sthirasukhe	sthirasukhayoḥ	sthirasukheṣu

Compound sthirasukha -

Adverb -sthirasukham -sthirasukhāt