まる
somaru

Godan Verb (ru)

1. to be dyed

Intransitive
Godan Verb (ru)

2. to be tainted; to be infected; to be stained; to be steeped

Intransitive
悪習 あくしゅう まるのは簡単 かんたんだ。
akushūni somaru nowa kantanda.
It's easy to fall into bad habits.