1. hard to do, deal with, or understand; requiring much effort or skill
2. not easy to please or satisfy; causing problems or trouble

Examples

• The math problem was too difficult for me to solve.
• Learning a new language can be difficult at first.
• She found it difficult to concentrate with all the noise.
• The hiking trail became more difficult as we climbed higher.
• He's being difficult about changing the meeting time.
• The difficult customer complained about everything.
• It's difficult to find parking downtown during rush hour.