The word feud derives from the Indo-European root *peig-, evil hearted.
The etymology of etymology is from the greek etumologia which means "true sense of a word"
a bitter, continuous hostility, esp. between two families, clans, etc., often lasting for many years or generations.
Etymology is the study of words and their origins and development.
I cannot believe that this query has not yet been answered: three minutes spent using the G* search function/engine will reveal that it refers to a 16th Century 'sport' or gambling game, then...
When Titania and Oberon fight and they are mad, there is a storm and the weather is bad. When they are happy and getting along, the weather is nice.