Declension table of ?sandhyāśaṅkha

Masculine	Singular	Dual	Plural
Nominative	sandhyāśaṅkhaḥ	sandhyāśaṅkhau	sandhyāśaṅkhāḥ
Vocative	sandhyāśaṅkha	sandhyāśaṅkhau	sandhyāśaṅkhāḥ
Accusative	sandhyāśaṅkham	sandhyāśaṅkhau	sandhyāśaṅkhān
Instrumental	sandhyāśaṅkhena	sandhyāśaṅkhābhyām	sandhyāśaṅkhaiḥ sandhyāśaṅkhebhiḥ
Dative	sandhyāśaṅkhāya	sandhyāśaṅkhābhyām	sandhyāśaṅkhebhyaḥ
Ablative	sandhyāśaṅkhāt	sandhyāśaṅkhābhyām	sandhyāśaṅkhebhyaḥ
Genitive	sandhyāśaṅkhasya	sandhyāśaṅkhayoḥ	sandhyāśaṅkhānām
Locative	sandhyāśaṅkhe	sandhyāśaṅkhayoḥ	sandhyāśaṅkheṣu

Compound sandhyāśaṅkha -

Adverb -sandhyāśaṅkham -sandhyāśaṅkhāt