Cursing a Parent
It is forbidden to curse a parent, even posthumously.
Hitting a Parent
It is forbidden to hit a parent.
Honoring Parents
"Honor your father and your mother"—Exodus 20:12.
We are commanded to honor our parents. This mitzvah includes serving them food and drink, and helping them dress and go.
Revering Parents
"Every man shall revere his mother and father"—Leviticus 19:3.
We are commanded to revere our parents; our consideration of them should be as we consider an individual whom we fear, who is able to administer punishment, such as a king.
This mitzvah includes not sitting in a place reserved for them, not voicing an opinion in their presence, and not contradicting them.