It is "more cheerful", the superlative being "most cheerful".
livelier
livelier, liveliest
The comparative form of in is inner.
The comparative form of solid is solider
comparative - merrier superlative - merriest
More lively
livelier
livelier, liveliest
The comparative form of busy is busier.
The comparative form of dreamy is dreamier
The comparative form of friendly is friendlier.
comparative form is cleaner superlative form is cleanest
The comparative form of "central" is "more central."
The comparative form of many is more
The comparative form of "clean" is "cleaner."
The comparative form of friendly is friendlier.
The comparative form of softly is more softly