costlier, costliest
It should be most costly.
"Less" is the comparative degree of little. The superlative degree is least.
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
most often is the superlative degree for often
It should be most costly.
costlier, costliest
Comparative is more expensive. Superlative is most expensive Pork is more expensive than chicken. But Beef is the most expensive.
"Less" is the comparative degree of little. The superlative degree is least.
comparative : purer superlative : purest
Comparative is wealthier and the superlative is wealthiest
Comparative: fouler Superlative: foulest
Comparative is wealthier and the superlative is wealthiest
The comparative degree of cheerful is more cheerful.Its superlative degree, then, is most cheerful.
The comparative degree is wider.
The comparative degree is 'more magnificent' and the superlative degree is 'most magnificent'.
comparative=more superlative=much