means The state of being utterly puzzled or bewildered, unable to make sense of something tangled and unclear.

from From Latin perplexus, meaning 'entangled' or 'interwoven' — the past participle of perplectere, built from per- ('thoroughly') and plectere ('to weave, to braid,' a cousin of the root behind 'plait' and 'complex'). To be perplexed, then, is to feel your thoughts knotted up like badly tangled threads. It arrived in English through Old French in the late Middle Ages, carrying that sense of mental entanglement intact.