2013.10.30 word (week8-3)

1.perennial (a.)
 a problem that people are concerned with all the time
The film addresses the perennial theme of marital discord .

2.perfidious (a.)
 disloyal and cannot be trusted
His behavior was most perfidious.

3.perforate (v.)
 to make a hole or holes in something
The target was perforated by bullets .

4.perforce (a.)
 because it is necessary
He fell sick and had perforce to stay at home .
 
5.perfunctory (a.)
is done quickly, and is only done because people expect it
There was a perfunctory search of his bags at the airport .