Strong's #2629: chacam (pronounced khaw-sam')
 a primitive root; to muzzle; by analogy, to stop the nose:--muzzle, stop.
Brown-Driver-Briggs Hebrew Lexicon:
 
  châsam 
 
 1) (Qal) to stop up, muzzle
 
  Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 2 times:
Deuteronomy 25:4: "Thou shalt not  muzzle the ox when he treadeth out"
Ezekiel 39:11: "on the east of the sea: and it  shall stop the noses of the passengers: and there shall they bury"