The phrase "aggressively difficult" is correct and usable in written English.
It can be used to describe a task or situation that is not only challenging but also presents a strong or intense level of difficulty.
Example: "The exam was aggressively difficult, leaving many students feeling overwhelmed and unprepared."
Alternatives: "extremely challenging" or "intensely difficult".
Not easy books, necessarily, but not aggressively difficult, either.
But the more nattering and pervasive complaint, which takes on more dimension in Max's biography, is that he is just too brainy and aggressively difficult — just too, well, mean.
CHICAGO — The Stravinsky score "Le Sacre du Printemps" ("The Rite of Spring," 1913), once notorious as the most aggressively difficult piece of music in the repertory, has now become familiar.
Some mothers mentioned that they would prefer if the FCHV would promote messages from the booklet with their family members more aggressively as it is difficult for mothers to influence senior family members regarding care-related decisions.
"Because the judiciary has already pursued cost containment so aggressively, it will become increasingly difficult to economize further without reducing the quality of judicial services," he wrote.
With some of your earlier films, audiences have tended to react to difficult subject matter more — — aggressively?
Some of its players have complained that it is difficult to defend as aggressively or to change direction as quickly on the surface.
Mr. Cuomo's campaign would not say where or on which stations the advertisement would run, or how much was being spent to broadcast it, making it difficult to assess how aggressively Mr. Cuomo had decided to counterattack.
Videolaryngoscopes are aggressively marketed, but independent evaluation in difficult airways is scarce.
SMC has been making life difficult for Parker Hannifin, by aggressively moving into the American market.
The concave driver and passenger seats and aggressively anti-whiplash headrests make it difficult to maintain good posture, since your neck is pushed forward to prevent whiplash but not a neck ache.
