Declension table of ?sayantra

Neuter	Singular	Dual	Plural
Nominative	sayantram	sayantre	sayantrāṇi
Vocative	sayantra	sayantre	sayantrāṇi
Accusative	sayantram	sayantre	sayantrāṇi
Instrumental	sayantreṇa	sayantrābhyām	sayantraiḥ
Dative	sayantrāya	sayantrābhyām	sayantrebhyaḥ
Ablative	sayantrāt	sayantrābhyām	sayantrebhyaḥ
Genitive	sayantrasya	sayantrayoḥ	sayantrāṇām
Locative	sayantre	sayantrayoḥ	sayantreṣu

Compound sayantra -

Adverb -sayantram -sayantrāt