Declension table of ?mātāpitṛsahasra

Neuter	Singular	Dual	Plural
Nominative	mātāpitṛsahasram	mātāpitṛsahasre	mātāpitṛsahasrāṇi
Vocative	mātāpitṛsahasra	mātāpitṛsahasre	mātāpitṛsahasrāṇi
Accusative	mātāpitṛsahasram	mātāpitṛsahasre	mātāpitṛsahasrāṇi
Instrumental	mātāpitṛsahasreṇa	mātāpitṛsahasrābhyām	mātāpitṛsahasraiḥ
Dative	mātāpitṛsahasrāya	mātāpitṛsahasrābhyām	mātāpitṛsahasrebhyaḥ
Ablative	mātāpitṛsahasrāt	mātāpitṛsahasrābhyām	mātāpitṛsahasrebhyaḥ
Genitive	mātāpitṛsahasrasya	mātāpitṛsahasrayoḥ	mātāpitṛsahasrāṇām
Locative	mātāpitṛsahasre	mātāpitṛsahasrayoḥ	mātāpitṛsahasreṣu

Compound mātāpitṛsahasra -

Adverb -mātāpitṛsahasram -mātāpitṛsahasrāt