Declension table of ?mānāsa

Neuter	Singular	Dual	Plural
Nominative	mānāsam	mānāse	mānāsāni
Vocative	mānāsa	mānāse	mānāsāni
Accusative	mānāsam	mānāse	mānāsāni
Instrumental	mānāsena	mānāsābhyām	mānāsaiḥ
Dative	mānāsāya	mānāsābhyām	mānāsebhyaḥ
Ablative	mānāsāt	mānāsābhyām	mānāsebhyaḥ
Genitive	mānāsasya	mānāsayoḥ	mānāsānām
Locative	mānāse	mānāsayoḥ	mānāseṣu

Compound mānāsa -

Adverb -mānāsam -mānāsāt