Wound
Damage, Flaw
noun
The kanji and the word are exactly the same. That means they share meanings as well.
To remember this reading, just think about what your mommy did for you when you were little and you got yourself a wound... she would kiss (きず) the wounds better. Of course, that never worked and was a total farce, but try to forgive mommy this one time, okay?
ウクレレに傷がついちゃったんです。
I got a scratch on my ukulele.
オレの名前によくも傷をつけてくれたな？！絶対に許さねえぞ！
How dare you damage my reputation? I'll never forgive you!
京都駅の階段で転んでできた傷は十年経った今もまだ治っていません。
The scars from a fall on the stairs at Kyoto Station have still not healed after ten years.