The first hint to crack the puzzle "Wakeful, e.g. a night without any shut-eye" is:

It is a word which contains 9 letters

The second hint to crack the puzzle "Wakeful, e.g. a night without any shut-eye" is:

It starts with letter s

The third hint to crack the puzzle "Wakeful, e.g. a night without any shut-eye" is:

It ends with letter s

Looking for extra hints for the puzzle "Wakeful, e.g. a night without any shut-eye"

Click on any empty tile to reveal a letter

The answer for the puzzle "Wakeful, e.g. a night without any shut-eye" is: