To prove that someone is not as good as he or she thinks. I cut my colleague down to size when I criticized what he said at the meeting.
To tell secrets or personal information to someone. I usually confide in my friend when I have a problem.
To disrupt the relationship between (two people). The mother's constant interfering finally came between the man and his wife.
To try to be extra friendly to someone. I do not know what my neighbor wants but recently he has been trying to cozy up to me.