Declension table of ?aupasandhya

Neuter	Singular	Dual	Plural
Nominative	aupasandhyam	aupasandhye	aupasandhyāni
Vocative	aupasandhya	aupasandhye	aupasandhyāni
Accusative	aupasandhyam	aupasandhye	aupasandhyāni
Instrumental	aupasandhyena	aupasandhyābhyām	aupasandhyaiḥ
Dative	aupasandhyāya	aupasandhyābhyām	aupasandhyebhyaḥ
Ablative	aupasandhyāt	aupasandhyābhyām	aupasandhyebhyaḥ
Genitive	aupasandhyasya	aupasandhyayoḥ	aupasandhyānām
Locative	aupasandhye	aupasandhyayoḥ	aupasandhyeṣu

Compound aupasandhya -

Adverb -aupasandhyam -aupasandhyāt