悠々【ゆうゆう】
quiet, calm, leisurely, composed, easily, comfortably, without difficulty, distant, far-off, boundless, endless, eternal
悠久【ゆうきゅう】
eternity, perpetuity, permanence
悠長【ゆうちょう】
leisurely, slow, deliberate, easygoing
悠々自適【ゆうゆうじてき】
living a life of leisure with dignity, living quietly and comfortably free from worldly cares, otium cum dignitate