impenetrable

• 形容无法穿透、无法通过的事物；也指难以理解或无法看透的人或事物。

Describes something that cannot be entered, passed through, or understood.

1. Impossible to enter or pass throughB2formal

   Not allowing anything to pass through; impossible to get into or through.

   无法穿透的

   • The fortress had impenetrable walls.
   • The jungle was so dense it was nearly impenetrable.
   • The security system was designed to be impenetrable.

   同义词impassableimpermeableimperviousnonporousunpassable

   反义词penetrablepermeableporous

2. Very dense, blocking lightB2formal

   So dense or thick that light cannot pass through.

   密不透光

   • An impenetrable fog covered the city.
   • The forest was dark due to the impenetrable canopy of leaves.
   • The glass was treated to be impenetrable to UV rays.

   同义词light-tightlightproofopaque

   反义词clearsee-throughtranslucenttransparent

3. Impossible to understandC1formal

   Not able to be understood or comprehended.

   难以理解的

   • The professor's lecture was impenetrable to the students.
   • The legal document was filled with impenetrable jargon.
   • His motives remained impenetrable to everyone.

   同义词abstrusebafflingenigmaticincomprehensibleinscrutableopaquepuzzlingreconditeunfathomableunintelligible

   反义词clearcomprehensibleintelligiblepenetrableunderstandable