run up against
Upper Intermediate (B2) neutral
To suddenly find a big problem or person blocking what you're trying to do
"The reform project ran up against fierce resistance from senior management."
Hear it in context
How artificial intelligence is reshaping college for students and professors
PBS NewsHour · 7:56
run up against or that their
Line Goes Up – The Problem With NFTs
Folding Ideas · 122:35
run up against a complication that the coders didn’t consider?