friendlier, friendliest
The comparative form of "friendly" is "friendlier," and the superlative form is "friendliest."
Friendlier and friendliest, respectively. More and most friendly are also correct, sometimes.
friendlier, friendliest
The comparative and superlative degrees of unfriendly are unfriendlier and unfriendliest. Less friendly and least friendly would also be good ways of conveying those ideas.
comparative : purer superlative : purest
Comparative: older Superlative: oldest
Dative; Early Comparative; Earlier Superlative; Earliest
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
comparative - merrier superlative - merriest
comparative = sadder superlative = saddest
Comparative: shallower Superlative: shallowest
The comparative is "stricter" and the superlative is "strictest".