Declension table of ?śaśvasāna

Masculine	Singular	Dual	Plural
Nominative	śaśvasānaḥ	śaśvasānau	śaśvasānāḥ
Vocative	śaśvasāna	śaśvasānau	śaśvasānāḥ
Accusative	śaśvasānam	śaśvasānau	śaśvasānān
Instrumental	śaśvasānena	śaśvasānābhyām	śaśvasānaiḥ śaśvasānebhiḥ
Dative	śaśvasānāya	śaśvasānābhyām	śaśvasānebhyaḥ
Ablative	śaśvasānāt	śaśvasānābhyām	śaśvasānebhyaḥ
Genitive	śaśvasānasya	śaśvasānayoḥ	śaśvasānānām
Locative	śaśvasāne	śaśvasānayoḥ	śaśvasāneṣu

Compound śaśvasāna -

Adverb -śaśvasānam -śaśvasānāt