Mercy is a noun so it doesn't have a comparative or superlative form. Merciful is the adjective. Comparative is more merciful. Superlative is most merciful
"Less" is the comparative degree of little. The superlative degree is least.
comparative : purer superlative : purest
The comparative degree of cheerful is more cheerful.Its superlative degree, then, is most cheerful.
Comparative is wealthier and the superlative is wealthiest
Comparative is wealthier and the superlative is wealthiest
Comparative: fouler Superlative: foulest
The comparative degree is bigger.
The comparative degree is wider.
The comparative degree is 'more magnificent' and the superlative degree is 'most magnificent'.
comparative=more superlative=much
there is no such thing as the superlative and comparative degree of better because better is the comparative form for well or good and the superlative for good or well is best