Declension table of ?etṛ

Masculine	Singular	Dual	Plural
Nominative	etā	etārau	etāraḥ
Vocative	etaḥ	etārau	etāraḥ
Accusative	etāram	etārau	etṝn
Instrumental	etrā	etṛbhyām	etṛbhiḥ
Dative	etre	etṛbhyām	etṛbhyaḥ
Ablative	etuḥ	etṛbhyām	etṛbhyaḥ
Genitive	etuḥ	etroḥ	etṝṇām
Locative	etari	etroḥ	etṛṣu

Compound etṛ -

Adverb -etṛ