水逆

1. • Mercury retrograde (abbr. for 水星逆行 shuǐxīngnìxíng) (coll.) to have a period of bad luck

     astrology

2. • water retention in the abdomen causing the vomiting of liquids as soon as one drinks

     TCM

Character by character

• 水(shuǐ)surname Shui
• 逆(nì)contrary