Definition
To finally understand or accept something, often after a period of doubt or resistance.
开始相信某事。
When will you finally get it into your head that he's really gone?
你什么时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.
我试图让她明白这不是个好主意，但她似乎就是无法理解。
He just can't get it into his head how serious the situation is.
他就是无法理解情况有多严重。