Declension table of mātṛ

Feminine	Singular	Dual	Plural
Nominative	mātā	mātarau	mātaraḥ
Vocative	mātaḥ	mātarau	mātaraḥ
Accusative	mātaram	mātarau	mātṝḥ mātaraḥ
Instrumental	mātrā	mātṛbhyām	mātṛbhiḥ
Dative	mātre	mātṛbhyām	mātṛbhyaḥ
Ablative	mātuḥ	mātṛbhyām	mātṛbhyaḥ
Genitive	mātuḥ	mātroḥ	mātṝṇām
Locative	mātari	mātroḥ	mātṛṣu

Compound mātṛ -

Adverb -mātṛ