Penned or shut up; confined; -- often with up.

closely confined

This is short for "pentagram of protection", the invulnerability item in classic Quake.

Also Pentise, Penthouse or Lean-to building.

is another popular style of roof. A pent roof is sloped, where one eave of roof is higher than the other across the whole width of building.

Pentium Processor

Pentagon; a five-sided figure.