Grammar › N2 · 07 Verb-form patterns
〜かねない: may well; could end up
N2 · 07 Verb-form patterns
Warns that something bad could happen.
Verb ます-stem + かねない. Always for a bad result: 事故になりかねない. The speaker thinks the risk is real. Compare 〜かもしれない, which is a general possibility; 〜かねない is a warning.
Examples
そんな運転をしたら、事故を起こしかねないよ。
If you drive like that, you could well cause an accident.
彼ならそういうことを言いかねない。
He is the type who might well say something like that.