unpenetrable

a. 不能穿入的, 难穿入的

词形变化

more unpenetrable 比较级 most unpenetrable 最高级

释义与例句

adj.
  1. 1.

    impenetrable

    1927, Ernest Bramah, Max Carrados Mysteries 'I suppose, inspector,' said Mr Carrados, 'it might seem rather unreasonable of me to ask you to come down here after being in court all day, eh?' 'Well, no, sir,' replied Inspector Beedel with his usual unpenetrable candour; […]

词源

From un- + penetrable.

来源：wiktionary