To combine in a confused fashion; to mingle so as to make the parts indistinguishable.
To stun or amaze.
To make something worse.
To cause to be ashamed; to abash.
To defeat, to frustrate, to thwart.
To fail to see the difference; to mix up; to confuse right and wrong.
To perplex or puzzle.
A confounding variable.
To make homogeneous, to blend or puree.
Specifically, to treat milk so that the cream no longer separates.