run into

verb9

1. •
   To enter by running.

   • He ran into the building.
2. •
   To unexpectedly encounter or meet someone or something (literally or figuratively).

   • I ran into your cousin the other day.
   • Everything was going according to plan until we ran into the legal problems.
3. •
   To collide with.

   • He lost control of the vehicle and ran into a tree.
   • I've sustained some front-end damage after running into a pothole.
4. •
   To cause to collide with.

   • He lost control of the vehicle and ran it into a tree.
5. •
   To reach a large figure.

   • By the end, the cost of the project ran into the millions of dollars.
6. •
   To amount to.
7. •
   To reach, to flow into (a body of water).

   • Oeāso, on the coast, at the northern extremity of the Pyrenees, where the River Magrăda, now Urumea, runs into the sea. — 1849
8. •
   To blend into; to be followed by or adjacent to without there being a clear boundary.
9. •
   To cause to blend into.

   • You can use the paintbrush this way to run the colors into each other.