1. knock against collide violently with an obstacle
  2. antagonist someone who offers opposition
  3. protagonist the principal character in a work of fiction
  4. go against resist
  5. agnostic a person who claims the existence of God is unknowable
  6. knock-kneed having the knees abnormally close together and the ankles wide apart
  7. cognizant having or showing knowledge or understanding or realization
  8. incognito without revealing one's identity
  9. lean against rest on for support
  10. butt against lie adjacent to another or share a boundary
  11. knockwurst short thick highly seasoned sausage
  12. jar against collide violently with an obstacle
  13. incognizant (often followed by `of') not aware
  14. recognized generally approved or compelling recognition
  15. recognised provided with a secure reputation
  16. unorganised not having or belonging to a structured whole
  17. tobogganist someone who rides a toboggan
  18. knock-knee an inward slant of the thigh
  19. organist a person who plays an organ
  20. unbeknownst occurring or existing without the knowledge of