To bring into confusion.
To frustrate, discomfit.
To upset the composure of.
A state of disunion.
To be bewildered.
To choke; stifle.
To render giddy or senseless
To decay; rust.
One who wears a mask; one who appears in disguise at a masquerade or wears a mask in a ritual.
That which masks (noise in a signal, etc.).