1) The sound of someone being hit in the head with a piece of wood
2) A Norwegian word for "book"
3) An onomatopoeia
1) As Sally hit Billy in the head with the broom handle, a satisfying "bok" resonated throughout the room.
2) Jeg har en bok. (I have a book)
3) An onomatopoeia is a word that sounds like its sound effect.