• 月満つれば則ち虧くつきみつればすなわちかく

  every tide has its ebb

• 九仞の功を一簣に虧くきゅうじんのこうをいっきにかく

  to fail one step short of great success, to fall at the last hurdle

• 虧盈きえい

  waxing and waning

• 盈虧えいき

  waxing and waning (of the moon), phase