Declension table of ?tantravāya

Neuter	Singular	Dual	Plural
Nominative	tantravāyam	tantravāye	tantravāyāṇi
Vocative	tantravāya	tantravāye	tantravāyāṇi
Accusative	tantravāyam	tantravāye	tantravāyāṇi
Instrumental	tantravāyeṇa	tantravāyābhyām	tantravāyaiḥ
Dative	tantravāyāya	tantravāyābhyām	tantravāyebhyaḥ
Ablative	tantravāyāt	tantravāyābhyām	tantravāyebhyaḥ
Genitive	tantravāyasya	tantravāyayoḥ	tantravāyāṇām
Locative	tantravāye	tantravāyayoḥ	tantravāyeṣu

Compound tantravāya -

Adverb -tantravāyam -tantravāyāt