toughest

困难difficult

1.艰苦的；艰难的；棘手的having or causing problems or difficulties

严格；坚定strict/firm

2.严厉的；强硬的；无情的demanding that particular rules be obeyed and showing a lack of sympathy for any problems or suffering that this may cause

强壮strong

3.坚强的；健壮的；能吃苦耐劳的；坚韧不拔的strong enough to deal successfully with difficult conditions or situations

4.彪悍的；粗暴的；粗野的physically strong and likely to be violent

不易损坏not easily damaged

6.坚固的；不易切开（或打破、撕破等）的not easily cut, broken, torn, etc.

不幸unfortunate

7.(informal)~ (on sb)不幸的；倒霉的unfortunate for sb in a way that seems unfair

(as) tough as old boots|(as) tough as nails

很强壮；坚韧不拔；雷打不动very strong and able to deal successfully with difficult conditions or situations

tough luck

（表示同情）真不幸，真不走运used to show sympathy for sth unfortunate that has happened to sb

1.硬,嚼不动的(肉等);强健的;〈口〉强硬的(政策等)

2.不屈不挠的,坚强的;顽固的,固执的

3.难办的,费力的,棘手的(工作等);〈口〉困苦的(命运等)

4.〈美〉无法无天的,暴戾的,凶恶的

5.〈美俚〉极好的

6.强韧的,弯折不断的;胶黏的

1.〈美俚〉恶棍,无赖

1.〈美俚〉忍耐困难

1.difficult

2.strong and able to deal with difficult situations or pain

3.confident, and determined to get what you want

4.very strict and severe

5.food, especially meat, that is tough is very difficult to cut and chew

6.difficult to break or damage

7.likely to behave in a violent way

8.a tough place is one in which there is a lot of crime and violence

1.a violent man, especially a violent criminal

1.used for saying that you have no sympathy for someone

1.in a way that shows you are determined, strong, or not afraid