Declension table of ?suptatvac

Masculine	Singular	Dual	Plural
Nominative	suptatvaṅ	suptatvañcau	suptatvañcaḥ
Vocative	suptatvaṅ	suptatvañcau	suptatvañcaḥ
Accusative	suptatvañcam	suptatvañcau	suptatūcaḥ
Instrumental	suptatūcā	suptatvagbhyām	suptatvagbhiḥ
Dative	suptatūce	suptatvagbhyām	suptatvagbhyaḥ
Ablative	suptatūcaḥ	suptatvagbhyām	suptatvagbhyaḥ
Genitive	suptatūcaḥ	suptatūcoḥ	suptatūcām
Locative	suptatūci	suptatūcoḥ	suptatvakṣu

Compound suptatvak -

Adverb -suptatvaṅ