How can i get the Dryads to listen to reason ?

I found the diaries and the Amulet of the Ages.
Hodd the Dwarf leader repaired the Amulet, so now its a depleted AotA, but how can i recharge it ?

I can of course just kill the dragon to get the Word of Power but there has to be another way ...

hmm..get broken amulet from the cave ( don't talk to dragon yet ). Go take it to the dryads then leave the snowglobe and rotate it . go meet the dwarf . now leave again and turn the globe and now meet the dryads. after this go kill the dragon.