run into
verb
Definitions
To enter by running.
Example: He ran into the building.
To collide with.
Example: He lost control of the vehicle and ran into a tree.
To cause to collide with.
Example: He lost control of the vehicle and ran it into a tree.
(by extension) To encounter or meet unexpectedly (literally or figuratively).
Example: Everything was going according to plan until we ran into the legal problems.