Declension table of ?duravagraha

Neuter	Singular	Dual	Plural
Nominative	duravagraham	duravagrahe	duravagrahāṇi
Vocative	duravagraha	duravagrahe	duravagrahāṇi
Accusative	duravagraham	duravagrahe	duravagrahāṇi
Instrumental	duravagraheṇa	duravagrahābhyām	duravagrahaiḥ
Dative	duravagrahāya	duravagrahābhyām	duravagrahebhyaḥ
Ablative	duravagrahāt	duravagrahābhyām	duravagrahebhyaḥ
Genitive	duravagrahasya	duravagrahayoḥ	duravagrahāṇām
Locative	duravagrahe	duravagrahayoḥ	duravagraheṣu

Compound duravagraha -

Adverb -duravagraham -duravagrahāt