impenetrable - a. 뚫을 수 없는, 불가해한, 둔감한

• penetrable

• Computer jargon is completely impenetrable to me.
• Let your plans be dark and impenetrable as night, and when you move, fall like a thunderbolt.
• We might think that putting fresh fruit in impenetrable plastic containers for our ' convenience ' is the apotheosis of an industry gone mad.