Declension table of ?dvaimāsya

Neuter	Singular	Dual	Plural
Nominative	dvaimāsyam	dvaimāsye	dvaimāsyāni
Vocative	dvaimāsya	dvaimāsye	dvaimāsyāni
Accusative	dvaimāsyam	dvaimāsye	dvaimāsyāni
Instrumental	dvaimāsyena	dvaimāsyābhyām	dvaimāsyaiḥ
Dative	dvaimāsyāya	dvaimāsyābhyām	dvaimāsyebhyaḥ
Ablative	dvaimāsyāt	dvaimāsyābhyām	dvaimāsyebhyaḥ
Genitive	dvaimāsyasya	dvaimāsyayoḥ	dvaimāsyānām
Locative	dvaimāsye	dvaimāsyayoḥ	dvaimāsyeṣu

Compound dvaimāsya -

Adverb -dvaimāsyam -dvaimāsyāt