bark1
  
  n.
 the sharp explosive cry of a dog, fox, or seal.
v.
  - (of a dog, fox, or seal) give a bark.
- utter (a command or question) abruptly or aggressively. ▸US call out in order to sell or advertise something. 
Phrase
  
    - one's bark is worse than one's bite
 one is not as ferocious as one seems.
- be barking up the wrong tree
 informal be pursuing a mistaken line of thought.
 
  Etymology
  OE beorc (n.), beorcan (v.), of Gmc origin.
 
  
    
bark2
  
  n.
 the tough protective outer sheath of the trunk, branches, and twigs of a tree or woody shrub.
v.
   - strip the bark from.
- scrape the skin off (one's shin) by accidentally hitting it.
- tan or dye (leather or other materials) using the tannins found in bark.
Derivative
  
  Etymology
  ME: from ON bǫrkr; perh. rel. to birch.