anyone know what daro means?

sorry for the slightly strange question, but i have a friend who is reading tolkien (in Hebrew) and she loves elvish. she's trying to translate as much as possible of the elvish in lotr and is doing quite well, i think! theres just one thing she hasn't managed to get, and that's what does Daro mean??? it doesn't appear in the silma or anywhere that she's managed to find. i promised to ask everyone here, but i doubt anyone will know
can anyone help?