Declension table of ?maithunya

Neuter	Singular	Dual	Plural
Nominative	maithunyam	maithunye	maithunyāni
Vocative	maithunya	maithunye	maithunyāni
Accusative	maithunyam	maithunye	maithunyāni
Instrumental	maithunyena	maithunyābhyām	maithunyaiḥ
Dative	maithunyāya	maithunyābhyām	maithunyebhyaḥ
Ablative	maithunyāt	maithunyābhyām	maithunyebhyaḥ
Genitive	maithunyasya	maithunyayoḥ	maithunyānām
Locative	maithunye	maithunyayoḥ	maithunyeṣu

Compound maithunya -

Adverb -maithunyam -maithunyāt