Declension table of ?iṣṭatara

Masculine	Singular	Dual	Plural
Nominative	iṣṭataraḥ	iṣṭatarau	iṣṭatarāḥ
Vocative	iṣṭatara	iṣṭatarau	iṣṭatarāḥ
Accusative	iṣṭataram	iṣṭatarau	iṣṭatarān
Instrumental	iṣṭatareṇa	iṣṭatarābhyām	iṣṭataraiḥ iṣṭatarebhiḥ
Dative	iṣṭatarāya	iṣṭatarābhyām	iṣṭatarebhyaḥ
Ablative	iṣṭatarāt	iṣṭatarābhyām	iṣṭatarebhyaḥ
Genitive	iṣṭatarasya	iṣṭatarayoḥ	iṣṭatarāṇām
Locative	iṣṭatare	iṣṭatarayoḥ	iṣṭatareṣu

Compound iṣṭatara -

Adverb -iṣṭataram -iṣṭatarāt