The first hint to crack the puzzle "One who finds it impossible to sleep at night" is:

It is a word which contains 9 letters

The second hint to crack the puzzle "One who finds it impossible to sleep at night" is:

It starts with letter i

The third hint to crack the puzzle "One who finds it impossible to sleep at night" is:

It ends with letter c

Looking for extra hints for the puzzle "One who finds it impossible to sleep at night"

Click on any empty tile to reveal a letter

The answer for the puzzle "One who finds it impossible to sleep at night" is: