Unhealthy
Not Healthy
noun, な adjective
If 健康 is "health," then something that is not this is unhealthy.
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. Will help to know 健康 first.
不健康なやり方でダイエットをするのはよした方がいい。
You shouldn't go on a diet in an unhealthy way.
私も親になったから、これまでの不健康な生活を見直そうと思ってるんです。
Now that I've become a parent, I'm thinking of reevaluating my unhealthy lifestyle.
この番組は暴力的で、不健康な内容が多いので子供には見せたくないんですよね。
This show is violent and contains a lot of unwholesome content, so I don't want my kids watching it.