Declension table of ?kaṭhara

Neuter	Singular	Dual	Plural
Nominative	kaṭharam	kaṭhare	kaṭharāṇi
Vocative	kaṭhara	kaṭhare	kaṭharāṇi
Accusative	kaṭharam	kaṭhare	kaṭharāṇi
Instrumental	kaṭhareṇa	kaṭharābhyām	kaṭharaiḥ
Dative	kaṭharāya	kaṭharābhyām	kaṭharebhyaḥ
Ablative	kaṭharāt	kaṭharābhyām	kaṭharebhyaḥ
Genitive	kaṭharasya	kaṭharayoḥ	kaṭharāṇām
Locative	kaṭhare	kaṭharayoḥ	kaṭhareṣu

Compound kaṭhara -

Adverb -kaṭharam -kaṭharāt