expression, godan verb (-ru)
Idiomatic expression meaning to relent or compromise after initially resisting, often in an argument or negotiation. The literal meaning 'to break one's horn' is not used in modern Japanese.
彼は頑固だったが、最後には角を折って譲歩した。
He was stubborn, but in the end he gave in and compromised.
議論で角を折るのは難しいが、時には必要だ。
It's hard to yield in an argument, but sometimes it's necessary.