Declension table of ?yuvana

Masculine	Singular	Dual	Plural
Nominative	yuvanaḥ	yuvanau	yuvanāḥ
Vocative	yuvana	yuvanau	yuvanāḥ
Accusative	yuvanam	yuvanau	yuvanān
Instrumental	yuvanena	yuvanābhyām	yuvanaiḥ yuvanebhiḥ
Dative	yuvanāya	yuvanābhyām	yuvanebhyaḥ
Ablative	yuvanāt	yuvanābhyām	yuvanebhyaḥ
Genitive	yuvanasya	yuvanayoḥ	yuvanānām
Locative	yuvane	yuvanayoḥ	yuvaneṣu

Compound yuvana -

Adverb -yuvanam -yuvanāt