To belittle or express disapproval of.
To declare something obsolescent; to recommend against a function, technique, command, etc. that still works but has been replaced.
To detract from (something); to disparage, belittle.
To remove a part, to detract from (a quality of excellence, authority etc.).
To act in a manner below oneself; to debase oneself.
To take away (something from something else) in a way which leaves it lessened.