Declension table of ?tvacya

Masculine	Singular	Dual	Plural
Nominative	tvacyaḥ	tvacyau	tvacyāḥ
Vocative	tvacya	tvacyau	tvacyāḥ
Accusative	tvacyam	tvacyau	tvacyān
Instrumental	tvacyena	tvacyābhyām	tvacyaiḥ tvacyebhiḥ
Dative	tvacyāya	tvacyābhyām	tvacyebhyaḥ
Ablative	tvacyāt	tvacyābhyām	tvacyebhyaḥ
Genitive	tvacyasya	tvacyayoḥ	tvacyānām
Locative	tvacye	tvacyayoḥ	tvacyeṣu

Compound tvacya -

Adverb -tvacyam -tvacyāt