Dic:// come up against

─. If you come up against a problem or difficulty, you are faced with it and have to deal with it.

─. to have to deal with problems or difficulties.

─. come up against (something): to be stopped or slowed by (something)

• We came up against a great deal of resistance in dealing with the case.
• We may find we come up against quite a lot of opposition from local people.
• You've got no idea of what you're going to come up against.
• The proposal has come up against some opposition. [= there is some opposition to the proposal]
• In the first week, we came up against a pretty tricky problem.

.... Cobuild, LDOCE, Merriam-Webster Learner, Macmillan,