Declension table of ?sandhyāvāsa

Masculine	Singular	Dual	Plural
Nominative	sandhyāvāsaḥ	sandhyāvāsau	sandhyāvāsāḥ
Vocative	sandhyāvāsa	sandhyāvāsau	sandhyāvāsāḥ
Accusative	sandhyāvāsam	sandhyāvāsau	sandhyāvāsān
Instrumental	sandhyāvāsena	sandhyāvāsābhyām	sandhyāvāsaiḥ sandhyāvāsebhiḥ
Dative	sandhyāvāsāya	sandhyāvāsābhyām	sandhyāvāsebhyaḥ
Ablative	sandhyāvāsāt	sandhyāvāsābhyām	sandhyāvāsebhyaḥ
Genitive	sandhyāvāsasya	sandhyāvāsayoḥ	sandhyāvāsānām
Locative	sandhyāvāse	sandhyāvāsayoḥ	sandhyāvāseṣu

Compound sandhyāvāsa -

Adverb -sandhyāvāsam -sandhyāvāsāt