difficult的近义词为tough
例句
1.
That's a tough call.
那是个艰难的决定。
2.
She's had a really tough time the last year and a half
这一年半以来，她度过了一段非常艰难的时期。
3.
The government has introduced some tough new laws on food hygiene.
政府对食物卫生出台了一些强硬的新法规。
difficult的近义词是：
hard/tough
adj. 困难的；不随和的；执拗的
difficult
美 /ˈdɪfɪkəlt/英 /ˈdɪfɪkəlt/
adj.困难的；不随和的；执拗的
比较级 more difficult
最高级 most difficult
双语例句：
It is very difficult for me to learn a new language.
对我来说，学习一门新语言很难。
Small businesses struggle to survive in this difficult economic environment.
小企业在这种恶劣的经济环境中挣扎求生。
