difficult的对应词为easy/hard/tough
difficult
adj. 困难的，费力的；不友好的，难对付的
同义词有tough，hard，困难的，艰难的
The tough thing is trying to instil a winning attitude in the kids.
困难在于要尽力给孩子们灌输胜利的心态。
反义词有easy 容易的
It was no easy matter getting him to change his mind.
让他改变主意可不是件容易的事儿。
