You can trip over one if it isn't tied right, It makes a Nike or Adidas fit and sit tight. You wear one Birkenstock, it also doesn't fall, But here's not a single one playing that role.

First four play a song Last three tell how long Together, cover a scar A result of a boo boo, or all out war

Phonetic to an improper tense that means ‘I am the champ’. Twisting gears if it’s done up. Down-time so turn off lamps. Its other form, a measured chill. Grinds a grain upon a hill. A breaker worn. A chime that trills. Without it, all that’s left is, still.

Dress me in fine linen, wrap me in a sheet, and I'll be sure to comfort you from your head down to your feet. What am I

Often seen in the middle of the night, I can also send an ball into flight. What am I?