To say something incorrectly by mistake; to make an error in speech or slip of the tongue.
うっかり言い誤ってしまい、相手を怒らせてしまった。
I accidentally misspoke and ended up making the other person angry.
緊張して名前を言い誤ることはよくあることだ。
It's common to get someone's name wrong when you're nervous.
録音を聞き返したら、彼が言い誤った箇所がはっきり分かった。
When I listened to the recording again, I could clearly hear where he had misspoken.