From yuno (“youth, child”) + -ulo (masculine suffix). yunulo (plural <span class="searchmatch">yunuli</span>) boy...
nominative yunul yunuls genitive yunula yunulas dative yunule yunules accusative <span class="searchmatch">yunuli</span> <span class="searchmatch">yunulis</span> vocative 1 o yunul! o yunuls! predicative 2 yunulu yunulus...