comparative : purer superlative : purest
Comparative: cruder or more crude or less crude Superlative: crudest
Comparative: cleaner Superlative: cleanest
Comparative: softer Superlative: softest
Comparative: more natural Superlative: most natural
Comparative: more sincere Superlative: most sincere
more sincere -- James is more sincere than Melissa most sincere -- James is the most sincere person I know.
The way you have it spelled in your question is as good as any - it's not really a word. Sincere is a word who's comparative and superlative are : more sincere, most sincere.
The superlative degree of word sincere can be most sincere ,or sincerest according to its use in the sentence.
The comparative degree of sincere is more sincere.
Comparative: older Superlative: oldest
comparative : purer superlative : purest
The superlative is cloudiest; the comparative is cloudier.
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
What is the comparative and superlative of Often
comparative - merrier superlative - merriest
Comparative: shallower Superlative: shallowest