knap
1. [ verb ] strike sharply
Synonyms: rap
Examples:

"rap him on the knuckles"

Related terms: strike knock knock
2. [ verb ] break a small piece off from
Synonyms: cut_off break_off chip
Examples:

"chip the glass" "chip a tooth"

Related terms: cut carve bit
Similar spelling:   Knapp
  Knop
  Knupp
  Knopp
  Knopf
  Knipp
  Knipe
  Knepp
  Kneip
  knob
  Knab