You searched for: “ablutophobia
ablutophobia (s) (noun), ablutophobias (pl)
1. An obsessional fear of bathing: Activities based on ablutophobia may include avoidance of washing for long periods of time, an abnormal anxiety when even considering showering or when people are actually trying to clean themselves with water, and even their excessive dread when they see others who are washing.
2. A dread of water or of being seen in the nude: Some people who have ablutophobias are overly anxious that their bodies will be criticized or compared with those of others; while some simply have an abnormal fear of being in warm or cold water.

The ablutophobias which Susan's sister suffered, included being terribly afraid of going near swimming pools.