gejunuloj

ge- (“both sexes (or: of any sex)”) +‎ junuloj (“youths”)

• IPA^(key): [ɡejuˈnuloj]
• Rhymes: -uloj
• Hyphenation: ge‧ju‧nu‧loj

gejunuloj (accusative gejunulojn)

1. (plural only, dated) youths, including both female(s) and male(s)
   • 1912 April, Michael Gartner, “Sub Kaŝtana Arbo”, in Amerika Esperantisto, volume 11, number 3, page 23:

     Laŭ soleca vojeto vagas paro da gejunuloj. Ili ĝuas la belaĵojn, sed evidente trovas pli multe da ĉarmo en reciprokaj rigardoj.

     Along a lonely pathway wanders a young couple. They enjoy the beautiful sights, but obviously find more charm in reciprocal looks.

Dated construction by writers who understood junulo as a masculine noun. Since junulo is gender-neutral now, the ge- prefix is superfluous, unless one wishes to emphasize that a group of youth includes people of more than one gender.