Synonym: complicated, difficult, durable, firm, hard, hardy, obscure, strong, sturdy, unclear, vague. Antonym: tender. Similar words: toughness, dough, though, enough, through, drought, ought to, roughly. Meaning: [tʌf] 
n. 1. someone who learned to fight in the streets rather than being formally trained in the sport of boxing 2. an aggressive and violent young criminal 3. a cruel and brutal fellow. adj. 1. not given to gentleness or sentimentality 2. very difficult; severely testing stamina or resolution 3. physically toughened 4. substantially made or constructed 5. violent and lawless 6. feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') 7. resistant to cutting or chewing 8. unfortunate or hard to bear 9. making great mental demands; hard to comprehend or solve or believe.
n. 1. someone who learned to fight in the streets rather than being formally trained in the sport of boxing 2. an aggressive and violent young criminal 3. a cruel and brutal fellow. adj. 1. not given to gentleness or sentimentality 2. very difficult; severely testing stamina or resolution 3. physically toughened 4. substantially made or constructed 5. violent and lawless 6. feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') 7. resistant to cutting or chewing 8. unfortunate or hard to bear 9. making great mental demands; hard to comprehend or solve or believe. 
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181. It's tough on Geoff that he's going to miss the party.
182. The White House is hanging tough for a good agreement to be reached.
183. It was a very tough decision but we feel we made the right one.
184. Don't be too tough on him-he was only trying to help.
185. The tough new measures on drug abuse are likely to be a case of kill or cure.
186. Constant injury problems had made it tough for him to hold down a regular first team place.
187. I did a really tough aerobics class and then went out for a meal and undid the good work!
188. Government targets for increased productivity are described as "tough but manageable".
189. It's been a tough time, but I'm sure you'll come through and be all the wiser for it.
190. Life is tough for kids who aren't keeping up in school.
191. Learning to read as an adult is tough work, but you can win this battle if you try.
192. In industry, diamond can form a tough, non-corrosive coating for tools.
193. In her time at the United Nations she was considered a tough negotiator.
194. You will come through any crisis if you hang tough.
195. It's been a tough six months and I feel I've earned a few weeks off.
196. The EU is taking a tough line with the UK over this issue.
197. The steak was tough and the peas were like bullets.
198. They do tough interviews so you'll need to have your wits about you.
199. There is strong support here for the tough economic reforms ordained in the federal capital, Prague.
200. The meat was so tough that I simply couldn't get it down.
201. He's a good interviewer, tough and quick on the uptake .
202. The Dutch champions were denied victory in a tough 2?2 draw at Porto.
203. He's as tough as nails - a good man to have on the team.
204. Long hours and tough working conditions are often par for the course in catering.
205. His ability to talk tough while eating fast made a favourable impression on his dining companions.
206. He is used to tough defenders(sentencedict.com/tough.html), and he usually gets the better of them.
207. It was a tough course over a gradual ascent before the big climb of Bluebell Hill.
208. The clear message coming from the government is that they are getting tough on crime.
209. He argued that the economic recovery had been facilitated by his tough stance.
210. Kid - glove methods haven't worked it's time to get tough.
More similar words: toughness, dough, though, enough, through, drought, ought to, roughly, a thought, as though, thorough, although, go through, all through, throughout, get through, even though, run through, fall through, put through, cut through, thoroughly, come through, look through, pull through, pass through, carry through, break through, deep in thought, follow through.