Troublesome
Hard To Deal With, Trouble
noun, な adjective
The misfortune is just getting jammed in there. So much misfortune leads to very troublesome trouble.
厄介 describes something or someone that is troublesome, or the trouble itself. It's very similar to 面倒, but 厄介 is often used for more challenging or complicated situations.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. The やく gets changed to やっ.
ビエットの顔に落書きなんてしたら、後々厄介なことになるよ。
If you draw on Viet’s face, you’re asking for trouble.