To make a threat against someone; to use threats.
To portend, or give a warning of.
To call into question the validity of (a belief, idea, or viewpoint); to challenge.
He threatened me with a knife.
To menace, or be dangerous.
To be close to equaling or surpassing (a record, etc.)
To fear; to be afraid.
To shake, quiver, or vibrate.
A shake, quiver, or vibration.