Gruntled started out referring to pigs, in particular the little grunting noises they made when they were content. Later when it was applied to people it came t

Gruntled started out referring to pigs, in particular the little grunting noises they made when they were content. Later when it was applied to people it came to mean discontent, because people don't generally grumble when they are happy. So the modern return to 'content' is actually sympatico with its original meaning