Declension table of ?retra

Neuter	Singular	Dual	Plural
Nominative	retram	retre	retrāṇi
Vocative	retra	retre	retrāṇi
Accusative	retram	retre	retrāṇi
Instrumental	retreṇa	retrābhyām	retraiḥ
Dative	retrāya	retrābhyām	retrebhyaḥ
Ablative	retrāt	retrābhyām	retrebhyaḥ
Genitive	retrasya	retrayoḥ	retrāṇām
Locative	retre	retrayoḥ	retreṣu

Compound retra -

Adverb -retram -retrāt