scar             
 noun [ C ] uk/skɑːr/ us/skɑːr/
B2 疤,伤疤,伤痕
a mark left on part of the body after an injury, such as a cut, has healed
  a prominent/a noticeable/an ugly scar 凸出的/显眼的/丑陋的伤疤 
 That burn will leave a bad scar. 烧伤会留下严重的伤疤。 
 scar tissue 瘢痕组织 
 Compare: scab noun (SKIN)
 C1 精神创伤
a sign of damage to a person's mental state
  His early years in the refugee camp left a deep psychological scar. 早年的难民营生活给他留下了深深的心理创伤。 
  外观的破坏
a sign of physical destruction in a place
  Every village bears the scars of war . 每一个村庄都布满了战争留下的疮痍。 
 - More examples
 - He had a long scar across his cheek.
 - Her scar healed, but the redness remained for a long time.
 - His face is covered with scar tissue where he was badly burned.
 - "Just look at this scar!" said Aaron proudly, rolling up his trouser leg.
 - They did a very neat job stitching up your knee - there's hardly a scar there.
 
scar       
verb [ T often passive ] uk/skɑːr/ us/skɑːr/ -rr-
C2 结疤;留下伤痕
to leave a scar
  He was scarred as a result of the fire. 那场大火给他留下了伤疤。 
figurative His experiences in the army left him scarred for life (= had a serious mental effect on him for the rest of his life). 他的军旅生涯给他留下了终身的心灵创伤。 
 Synonym: mark