Declension table of ?mātṛkāyantra

Neuter	Singular	Dual	Plural
Nominative	mātṛkāyantram	mātṛkāyantre	mātṛkāyantrāṇi
Vocative	mātṛkāyantra	mātṛkāyantre	mātṛkāyantrāṇi
Accusative	mātṛkāyantram	mātṛkāyantre	mātṛkāyantrāṇi
Instrumental	mātṛkāyantreṇa	mātṛkāyantrābhyām	mātṛkāyantraiḥ
Dative	mātṛkāyantrāya	mātṛkāyantrābhyām	mātṛkāyantrebhyaḥ
Ablative	mātṛkāyantrāt	mātṛkāyantrābhyām	mātṛkāyantrebhyaḥ
Genitive	mātṛkāyantrasya	mātṛkāyantrayoḥ	mātṛkāyantrāṇām
Locative	mātṛkāyantre	mātṛkāyantrayoḥ	mātṛkāyantreṣu

Compound mātṛkāyantra -

Adverb -mātṛkāyantram -mātṛkāyantrāt