0 If a place or substance is penetrable, you can move into it or through it:
The riverside bushes were certainly very thick, but the undergrowth behind was evidently penetrable.
The barrier of poisonous gas appeared to be less penetrable than the rock that had been tunnelled through.
The U. S. airport security systems established in the early 1970s are penetrable by minimal ingenuity.
Everybody has a smartphone nowadays, and we are concerned about the safety of these vulnerable and penetrable devices.
The truth about this market has always been that it is penetrable, but only after tremendous effort.
1 able to be understood when studied or investigated:
