a difficult problem/choice/task
It will be very difficult to prove that they are guilty.
Many things make it difficult for women to reach the top in business.
He finds it extremely difficult being a single parent.
This book is very important because I have a difficult exam next Friday. (Key English Test; A2; Portuguese)
The manager is difficult to deal with/a difficult person to deal with.
His wife is a very difficult person.
Please children, don't be so difficult!
I'm not a difficult person and I can cook very [well]. (First Certificate in English; B2; German)
When two of your best friends argue it puts you in a very difficult position.
I know that I will put you in a difficult position with my absence but I must leave. (Certificate of Proficiency in English; C2; Greek)