more respectful, most respectful
The comparative form is more respectful and the superlative is most respectful. In general, words of three or more syllables use more and most to form the comparative and superlative forms, because adding -er or -est as a suffix (which works well with short words) tends to result in a word that is too long and difficult to pronounce.
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: shallower Superlative: shallowest
The comparative is "stricter" and the superlative is "strictest".
comparative = sadder superlative = saddest
The comparative is greater and the superlative is greatest.
comparative - rockier superlative - rockiest
Comparative - better Superlative - best