
English word perplex comes from Latin pro, Latin plexus (Twining, plaiting, braid.)
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pro (Latin)
About. According to. As befitting. As, like. Before. For. In front, instead of. On behalf of.
plexus (Latin)
Twining, plaiting, braid.
perplexus (Latin)
(figuratively) unintelligible, complicated, intricate, inscrutable, ambiguous; dark, obscure. Entangled, involved, intricate, confused.
perplex (English)
(transitive) To cause to feel baffled; to puzzle.. (transitive) To involve; to entangle; to make intricate or complicated.. (transitive, obsolete) To plague; to vex; to torment. (obsolete) intricate; difficult.