(1):

(a.) To involve; to entangle; to make intricate or complicated, and difficult to be unraveled or understood; as, to perplex one with doubts.

(2):

(a.) To plague; to vex; to tormen.

(3):

(a.) To embarrass; to puzzle; to distract; to bewilder; to confuse; to trouble with ambiguity, suspense, or anxiety.

(4):

(a.) Intricate; difficult.