not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "a difficult child"; "found himself in a difficult situation"; "why is it so hard for you to keep a secret?"
requiring much effort and trouble; "the mountain climb was long, steep, and difficult"
of leaves etc; growing in pairs on either side of a stem; "opposite leaves"
altogether different in nature or quality or significance; "the medicine's effect was opposite to that intended"; "it is said that opposite characters make a union happiest"- Charles Reade
the other one of a complementary pair; "the opposite sex"; "the two chess kings are set up on squares of opposite colors"
being directly across from each other; facing; "And I on the opposite shore will be, ready to ride and spread the alarm"- Longfellow; "we lived on opposite sides of the street"; "at opposite poles"
moving or facing away from each other; "looking in opposite directions"; "they went in opposite directions"
evil or harmful in nature or influence; "prompted by malign motives"; "believed in witches and malign spirits"; "gave him a malign look"; "a malign lesion"
having or showing determination and energetic pursuit of your ends; "an aggressive businessman"; "an aggressive basketball player"; "he was aggressive and imperious; positive in his convictions"; "aggressive drivers"
characteristic of an enemy or one eager to fight; "aggressive acts against another country"; "a belligerent tone"