Declension table of ?dyumaithuna

Neuter	Singular	Dual	Plural
Nominative	dyumaithunam	dyumaithune	dyumaithunāni
Vocative	dyumaithuna	dyumaithune	dyumaithunāni
Accusative	dyumaithunam	dyumaithune	dyumaithunāni
Instrumental	dyumaithunena	dyumaithunābhyām	dyumaithunaiḥ
Dative	dyumaithunāya	dyumaithunābhyām	dyumaithunebhyaḥ
Ablative	dyumaithunāt	dyumaithunābhyām	dyumaithunebhyaḥ
Genitive	dyumaithunasya	dyumaithunayoḥ	dyumaithunānām
Locative	dyumaithune	dyumaithunayoḥ	dyumaithuneṣu

Compound dyumaithuna -

Adverb -dyumaithunam -dyumaithunāt