Declension table of ?dīrghadarśitva

Neuter	Singular	Dual	Plural
Nominative	dīrghadarśitvam	dīrghadarśitve	dīrghadarśitvāni
Vocative	dīrghadarśitva	dīrghadarśitve	dīrghadarśitvāni
Accusative	dīrghadarśitvam	dīrghadarśitve	dīrghadarśitvāni
Instrumental	dīrghadarśitvena	dīrghadarśitvābhyām	dīrghadarśitvaiḥ
Dative	dīrghadarśitvāya	dīrghadarśitvābhyām	dīrghadarśitvebhyaḥ
Ablative	dīrghadarśitvāt	dīrghadarśitvābhyām	dīrghadarśitvebhyaḥ
Genitive	dīrghadarśitvasya	dīrghadarśitvayoḥ	dīrghadarśitvānām
Locative	dīrghadarśitve	dīrghadarśitvayoḥ	dīrghadarśitveṣu

Compound dīrghadarśitva -

Adverb -dīrghadarśitvam -dīrghadarśitvāt