Still
quieter
quieter
quieter, quietest
more quiet
The comparative form of good is better. The superlative form is best.
quieter, quietest
The comparative form of busy is busier.
The comparative form of friendly is friendlier.
The comparative form of dreamy is dreamier
comparative form is cleaner superlative form is cleanest
The comparative form of many is more
The comparative form of "central" is "more central."