It applies to a living being that can be left "confused, muted with amazement, dubious". It originates from the Latinperplexus, i, formed by the prefix per_ ( "intensifying") plectere ( "entangle , convolute" ).
In Colombia we use it as a synonym for sudden, stunned, astonished, lelo. Stunned, stunned. Affected by something that happens unexpectedly and in an unexpected instant. Surprised.