maintain
🇺🇸
/meɪnˈteɪn/
🇬🇧
/meɪnˈteɪn/
to keep something the same
You need to maintain a healthy diet to stay well.
to keep something working well by fixing it
It's important to maintain your car so it runs safely.
to provide what someone needs to live
He works hard to maintain his family.
to keep saying something is true
She continues to maintain that she is right.