expressing unexpected meetings with people or unforeseen challenges

to indicate that an encounter was unplanned or surprising, often conveying surprise or mild frustration.

meeting a stranger by chance at a public place, discovering a problem while working, bumping into something on the street.

casual conversation, informal settings, everyday situations, professional environments where brief encounters occur.

run into

run into

an old friend, difficulties, a dead end, a tree

• unexpectedly
• accidentally
• run into trouble
• run into a serious problem

• bump into (more informal
• often physical)
• encounter (more formal)
• face (for problems)

'Run into' does not take the word ‘with’; use simply ‘run into …’.

bump into – informal and often used for physical collisions; come across – more neutral about finding things; hit a wall / run into a brick wall – metaphorical expressions of hitting an insurmountable barrier.

Learners may incorrectly add 'with' (e.g., 'run into with a friend') or interpret 'run into' as a literal collision; emphasize its figurative use for unplanned encounters.

• run-in (noun
• argument)

When referring to people, implies a chance, unplanned meeting; when referring to problems, suggests an unforeseen or unwelcome obstacle.

Suggests surprise and sometimes mild irritation or acknowledgment of the unexpected nature of the encounter.

unexpected encounter

This chunk is often used in everyday conversations to express unexpected encounters or discoveries.

run into a brick wall (obstacle)