godan verb (-su), transitive verb
Archaic verb for mishearing something. In modern Japanese, 聞き間違える is the usual word.
In old documents it is written as 聞き外す, but nowadays we say 聞き間違える.
godan verb (-su), transitive verb
stop listening halfway through
Used when someone stops paying attention before the speaker finishes. Not common in modern conversation; 途中で聞くのをやめる is more natural.
彼は話の途中で聞き外してしまった。
He stopped listening halfway through the story.