difficult
A synonym of difficult is arduous.
difficult
I think you mean arduous. Arduous means very hard or difficult.
difficult, strenuous,
difficult
Here are a few:Climbing the mountain was an arduous undertaking, but she managed to do it.For me, washing the dishes is easy, but I find scrubbing the floor to be a much more arduous task.It is arduous to exercise when you are in bad shape or out of shape.
difficult, hard, laborious, tough
Very difficult to do
the def. is (difficult) (dont you mean arduous??)
Very difficult to do
arduous, perplexing, intricate, involved, hard
Difficult, arduous, burdensome, troublesome, strenuous, demanding, exacting...