difficult adj.
VERBS be, look, prove, seem, sound | become, get It is getting more and more difficult to find a job. | make sth The fog made driving very difficult. | find sth
ADV. exceedingly, extraordinarily, extremely, incredibly, particularly, really, very | doubly Her disability made taking care of the home and raising a family doubly difficult. | increasingly | a bit, quite, rather | notoriously Birth rates are notoriously difficult to predict.
You can also check other dicts: difficult (English, 中文解释 ), wordnet sense, Collins Definition