The bottom is a bathtub, the top is a person with water drops around him in three different pastures, which is person who is taking a bath.
The big shell script of for character bathe is
The small seal script for the character is
The left is Water, the right is Valley.
The clerical script for the character is
Its Pinyin is Yu4.
Now, the traditional bathe 浴 is not popular especially in cities. We learnt 沐 in post 229, which means Shower. Chinese now use 沐浴 (Shower-Bathe) together more often than just use single 沐 or single 浴. 沐浴 is a very common two-character word, which means bath with washing both hair and body no matter it is a shower or bathe.