The term RESTFUL RETREAT is a combination of two words, 'RESTFUL' and 'RETREAT'. The first word, 'RESTFUL', means to be peaceful and relaxed. The second word, 'RETREAT', refers to a place where one can go to get away from the hustle and bustle of everyday life. The crossword solution for this term is SPA, which stands for 'sanus per aquam', meaning 'health through water'. A SPA is a place where people can go to relax and rejuvenate their bodies and minds. It is a perfect place for a RESTFUL RETREAT.