Declension table of ?samithuna

Neuter	Singular	Dual	Plural
Nominative	samithunam	samithune	samithunāni
Vocative	samithuna	samithune	samithunāni
Accusative	samithunam	samithune	samithunāni
Instrumental	samithunena	samithunābhyām	samithunaiḥ
Dative	samithunāya	samithunābhyām	samithunebhyaḥ
Ablative	samithunāt	samithunābhyām	samithunebhyaḥ
Genitive	samithunasya	samithunayoḥ	samithunānām
Locative	samithune	samithunayoḥ	samithuneṣu

Compound samithuna -

Adverb -samithunam -samithunāt