The comparative form of "sincere" is "more sincere," while the superlative form is "most sincere." For example, you might say, "She is more sincere than her friend," and "He is the most sincere person I know." Unlike some adjectives, "sincere" does not form its comparative and superlative by simply adding "-er" or "-est."
comparative : purer superlative : purest
Comparative: more natural Superlative: most natural
more clean, cleaner
Comparative: cruder or more crude or less crude Superlative: crudest
I think it's softer and the softest
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.
comparative : purer superlative : purest
Dative; cloudy Caomparative; cloudier Superlative ; cloudiest
Comparative: older Superlative: oldest
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
Dative; Early Comparative; Earlier Superlative; Earliest
comparative - merrier superlative - merriest
comparative = sadder superlative = saddest
Comparative: shallower Superlative: shallowest