I'm not familiar with the word, but the comparative form of multi-syllabic adjectives is formed by adding the word "more" in front of it. The superlative form of multi-syllabic adjectives is formed by adding the word "most" in front of it.
Comparative: older Superlative: oldest
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
what is the comparative and superlative of glad
What is the comparative and superlative of Often
comparative - merrier superlative - merriest
Comparative: shallower Superlative: shallowest
The superlative of "sad" is "saddest" and the comparative is "sadder".
The comparative is "stricter" and the superlative is "strictest".
The comparative is greater and the superlative is greatest.
comparative = tenderer superlative = tenderest
comparative: thicker superlative: thickest
comparative - nicer superlative - nicest