Declension table of ?sayantra

Masculine	Singular	Dual	Plural
Nominative	sayantraḥ	sayantrau	sayantrāḥ
Vocative	sayantra	sayantrau	sayantrāḥ
Accusative	sayantram	sayantrau	sayantrān
Instrumental	sayantreṇa	sayantrābhyām	sayantraiḥ sayantrebhiḥ
Dative	sayantrāya	sayantrābhyām	sayantrebhyaḥ
Ablative	sayantrāt	sayantrābhyām	sayantrebhyaḥ
Genitive	sayantrasya	sayantrayoḥ	sayantrāṇām
Locative	sayantre	sayantrayoḥ	sayantreṣu

Compound sayantra -

Adverb -sayantram -sayantrāt