Declension table of ?manāna

Neuter	Singular	Dual	Plural
Nominative	manānam	manāne	manānāni
Vocative	manāna	manāne	manānāni
Accusative	manānam	manāne	manānāni
Instrumental	manānena	manānābhyām	manānaiḥ
Dative	manānāya	manānābhyām	manānebhyaḥ
Ablative	manānāt	manānābhyām	manānebhyaḥ
Genitive	manānasya	manānayoḥ	manānānām
Locative	manāne	manānayoḥ	manāneṣu

Compound manāna -

Adverb -manānam -manānāt