disreputable	prestigious
losing	winning
uncertain	certain
dissimilar	resembling
unimportant	important
unsuccessful	successful
unrecognisable	recognisable
playful unreliable	serious
unpopular	popular
decreasing	increasing
nonhazardous	hazardous
close	distant
indirect	direct
ubnormal	normal
missing	attending
unsafe	safe
following	previous
uncourageous	courageuos