Restfully Iwas free

No. Restful is an adjective. The adverb would be "restfully."

It's just a cliché, and people use it without thinking. It implies sleeping soundly, untroubled by worries and fears--safe, carefree, and completely restfully.

Insomnia is more common as you age. But if, at any stage in life, you aren't sleeping restfully and waking refreshed, talk to your doctor about mirtazapine, it's not a classic "sleeping pill" but will help you sleep like you did when you were 17.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern R-S-F----. That is, nine letter words with 1st letter R and 3rd letter S and 5th letter F. In alphabetical order, they are:

resifting

resoftens

restfully

rosefinch