Weak Point
Weakness
noun
The weak point is your weak point.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
ついにアイツの弱点を見つけたぜ！
I finally discovered his weak point!
あの体そうせん手の弱点は、せいかくがじゅうなんせいに欠けているところだ。
That gymnast's weakness is that her personality lacks flexibility.
私の従業員としての弱点は、恐らく弱点が一つも無いことです。
My weak point as an employee is probably that I have no weaknesses.