Dara Celtic Knot - The meaning of the word, 'Dara' can be traced to an Irish word, doire which means 'oak tree'. The Dara Celtic knot is associated with the root system of oak trees. The Celtics and especially, Druids considered the oak tree as sacred.
Karma symbols such as endless knot (above) are common cultural motifs in Asia. Endless knots symbolize interlinking of cause and effect, a Karmic cycle that continues eternally. The endless knot is visible in the center of the prayer wheel.