godan verb (-su), transitive verb
make someone realize; teach a lesson; bring home to someone
Used when someone is forced to understand something, often a mistake or harsh reality, through experience or strong words. Similar to 思い知らせる but with a slightly more forceful or direct nuance.
See also: 思い知らせる
彼の失敗を思い知らすために、厳しい言葉をかけた。
I used harsh words to make him realize his mistake.
現実を思い知らすような出来事だった。
It was an event that brought reality home to me.