"Ugly" is opposite to
beautiful
young or old
young
a ... boy
young
"Strong" is opposite to
weak
a ... skirt
long
an ... chicken
ugly
"Slow" is opposite to
Fast
a ... snail
slow
a ... rabbit
strong
a ... elephant
clean
a ... rabbit
weak
"Long" is opposite to
short
slow or fast
fast
a ... skirt
short
"Clean" is opposite to
dirty
"Young" is opposite to
old