Usages of eksoni
Se subite eksonos tondro en la nokto, la infanoj ne tiom timos, se vi restos apud ili.
If thunder suddenly sounds in the night, the children will not be so afraid if you stay next to them.
Kiam eksonis la sonorilo, mi malfermis la pordon.
When the doorbell started ringing, I opened the door.
Elon.io is an online learning platform
We have an entire course teaching Esperanto grammar and vocabulary.