Declension table of ?jahāna

Neuter	Singular	Dual	Plural
Nominative	jahānam	jahāne	jahānāni
Vocative	jahāna	jahāne	jahānāni
Accusative	jahānam	jahāne	jahānāni
Instrumental	jahānena	jahānābhyām	jahānaiḥ
Dative	jahānāya	jahānābhyām	jahānebhyaḥ
Ablative	jahānāt	jahānābhyām	jahānebhyaḥ
Genitive	jahānasya	jahānayoḥ	jahānānām
Locative	jahāne	jahānayoḥ	jahāneṣu

Compound jahāna -

Adverb -jahānam -jahānāt