problem-

1. A question or situation that presents doubt, uncertainty, perplexity, or difficulty.
2. A question proposed for solution or discussion.
3. In mathematics: A statement requiring a solution, usually by means of a mathematical operation or geometric construction.
4. Someone who is difficult to deal with.
5. Difficult to train or guide; unruly; such as, a problem child.
6. In literature: Dealing with choices of action difficult either for an individual or for society at large.
7. "No problem", used as a conventional reply to a request or to express confirmation, affirmation, or gratitude.
8. Etymology: "a difficult question proposed for solution", from Old French problème (14c.); from Latin problema, from Greek problema, "a problem, a question"; literally, "thing put forward"; from proballein, "propose"; from pro-, "forward" + ballein, "to throw".

1. A reference to the nature of a problem; doubtful; uncertain; questionable.
2. Posing a problem; difficult to solve; such as, a repair that proved more problematic than first expected.
3. Open to doubt; debatable.
4. Not settled; unresolved or dubious: "He has a problematic future."

1. Posing a problen.
2. Open to doubt; debatable.
3. Making great mental demands.
4. Hard to comprehend or solve.

In such a way as to pose a problem.

To propose problems.

Things that cause difficulties or those things that are hard to deal with.

Easy and not involved or complicated; uncomplicated: "It was an unproblematic solution to the situation."