The mountains were completely inaccessible half the year and impassable for trading purposes the rest of the time.
Since 1837 it has been partially submerged by the reservoir, and is completely inaccessible.
Rather than exploring new subjects, we are extending old ones, often to the point that they are completely inaccessible to those not in the field.
The water sources had been closed up so thoroughly that they must have been completely inaccessible right after the shakes.
As far as he could see the canyon was completely inaccessible.
During the floods, the second bit of upland is completely inaccessible.
They were protesting the fact that city's transit system was completely inaccessible for the physically disabled.
The problem was it appeared to be completely inaccessible.
Remember, though, that you need to get at an internal filter for maintenance, so don't make it completely inaccessible.
Another higher falls is located above the first, but is completely inaccessible.