keep
Definitions
To continue to have or hold something; to retain possession of.
To cause to remain in a particular state, condition, or place.
To observe, fulfill, or carry out a promise, agreement, or custom.
Examples
Please keep the door closed to prevent the cat from escaping.
It is important to keep your promises if you want people to trust you.
I like to keep a small notebook in my pocket to jot down ideas.