forage and barren
more difficult, most difficult
Difficult: more difficult most difficult
The comparative form of difficult is more difficult and the superlative form is most difficult. Difficult means 'hard to accomplish.'
There is no plural for difficult.
more difficult, most difficult
more difficult, most difficult
For the word "difficult, the comparative is more difficult and the superlative is most difficult
more difficult, most difficult
more difficult, most difficult
more difficult, most difficult
More difficult and most difficult. With a word that long we don't generally add the -er or -est suffixes.
The plural of "it's a difficult exam" would be "they're difficult exams."