problem

Something difficult that you need to understand, accept, or deal with.

• We have a problem.
• She solved the problem with our computer.
• Do you have a problem accepting his decision?

How to use it: a problem with something (There is a problem with the printer.); have a problem doing something (I have a problem remembering names.)

Similar words: difficulty, issue, trouble

Common phrases: have a problem, solve a problem, problem with something, serious problem

A question or exercise that you must find an answer to, especially in school.

• The first problem is easy.
• We solved ten problems for homework.
• Can you explain this math problem?

Similar words: question, exercise

Common phrases: math problem, solve a problem, practice problem, problem set

In the expression 'no problem', a friendly way to agree to do something.

• 'Can you help me?' 'No problem.'
• 'Could you carry this bag?' 'Sure, no problem.'
• 'Will you collect me tomorrow?' 'No problem.'

Common phrases: no problem, sure no problem

In the expression 'no problem', a friendly reply when someone thanks you or says sorry.

• 'Thanks for your help.' 'No problem.'
• 'Sorry I'm late.' 'No problem; we haven't started.'
• 'Thank you for waiting.' 'No problem at all.'

Common phrases: no problem, really no problem