这是致命的错误。
This is a fatal mistake.
fatal; mortal; deadly
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
这是致命的错误。
This is a fatal mistake.
伤口致命。
The wound is fatal.