2 words starting with K

• knell noun

  the sound of a bell rung slowly; a sign that something is ending

  The arrival of smartphones sounded the knell for the old film camera.

  Like toll

• kowtow verb

  to act too humbly and obediently toward someone with power

  He refused to kowtow to the rich customers and treated everyone the same.

  Like grovel, fawn, toady