Declension table of ?dīrghakaṇṭhaka

Masculine	Singular	Dual	Plural
Nominative	dīrghakaṇṭhakaḥ	dīrghakaṇṭhakau	dīrghakaṇṭhakāḥ
Vocative	dīrghakaṇṭhaka	dīrghakaṇṭhakau	dīrghakaṇṭhakāḥ
Accusative	dīrghakaṇṭhakam	dīrghakaṇṭhakau	dīrghakaṇṭhakān
Instrumental	dīrghakaṇṭhakena	dīrghakaṇṭhakābhyām	dīrghakaṇṭhakaiḥ dīrghakaṇṭhakebhiḥ
Dative	dīrghakaṇṭhakāya	dīrghakaṇṭhakābhyām	dīrghakaṇṭhakebhyaḥ
Ablative	dīrghakaṇṭhakāt	dīrghakaṇṭhakābhyām	dīrghakaṇṭhakebhyaḥ
Genitive	dīrghakaṇṭhakasya	dīrghakaṇṭhakayoḥ	dīrghakaṇṭhakānām
Locative	dīrghakaṇṭhake	dīrghakaṇṭhakayoḥ	dīrghakaṇṭhakeṣu

Compound dīrghakaṇṭhaka -

Adverb -dīrghakaṇṭhakam -dīrghakaṇṭhakāt