Chronic
noun, の adjective
If it's in your nature to ridicule people, it will become a chronic problem. You can't change something that's so embedded in who you are, which is a shame, since you're a jerk.
まんせい
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
私は慢性胃腸炎を患っているんです。
I suffer from chronic gastroenteritis.