Nenia is a fascinating word because it can mean both a 'lullaby' and a 'dirge' or 'lament'. This duality makes it quite unique and emotionally rich.
In "Che Sarà", the singer says, "Una nenia di paese suonerò" (I will play a village nenia). Given the context of leaving his hometown and the melancholic tone, it likely refers to a mournful, nostalgic tune that reminds him of home, blending the comfort of a lullaby with the sadness of a lament for what's left behind.
"Che Sarà" is a song about leaving a small hometown behind. The singer looks at the village on the hill, worn out and quiet, and decides he has to go, even though he doesn't know what waits for him.
The title phrase, "che sarà," means "whatever will be." It's the singer's way of accepting the unknown instead of fearing it. He is losing friends who are also moving away, and he knows he'll miss the company, but he still feels the pull to leave.
Even so, the song isn't really a goodbye. He promises he'll come back one day with his guitar, and that he'll always carry a piece of home with him wherever he ends up.