Definition
To finally understand or accept something, often after a period of doubt or resistance.
開始相信某事。
When will you finally get it into your head that he's really gone?
你什麼時候才能明白他真的走了？
I tried to make her understand it wasn't a good idea, but she couldn't seem to get it into her head.
我試圖讓她明白這不是個好主意，但她似乎就是無法理解。
He just can't get it into his head how serious the situation is.
他就是無法理解情況有多嚴重。