to settle down; to get a steady job; to marry and raise a family
to attire oneself; to outfit oneself
そろそろ身を固める時期だと思う。
I think it's time to settle down.
身を固めて家庭を持つことにした。
I decided to settle down and start a family.
三十歳を前に、ついに身を固めた。
He finally settled down just before turning thirty.