Dryas are tree nymphs in Greek mythology. In Greek drys signifies 'oak,' from an Indo-European root *derew(o)- 'tree' or 'wood'. Thus dryads are specifically the nymphs of oak trees, though the term has come to be used for all tree nymphs in general. "Such deities are very much overshadowed by the divine figures defined through poetry and cult," Walter Burkert remarked of Greek nature deities (Burkert 1986, p174). Normally considered to be very shy creatures, except around the goddess Artemis who was known to be a friend to most nymphs.