gash       
 noun [ C ] uk/ɡæʃ/ us/ɡæʃ/
 (尤指皮肤上)深长的伤口,大而深的切口
a long, deep cut, especially in the skin
 Synonym: slash (CUT)
 gash       
verb [ T ] uk/ɡæʃ/ us/ɡæʃ/
 造成(尤指皮肤上)深长的伤口
to make a long, deep cut in something, especially the skin on a part of the body
  She slipped on a rock and gashed her knee. 她摔倒在一块石头上,把膝盖划了个大口子。 
 Synonym: slash