Spanish has several words that could be translated "sign" in English:
What are the differences between these words? In what situations can each be used?
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"Indicio" means something like "clue", while "seña" has many meanings, the most usual is "gesture" (like waving a hand, or closing one eye), but also means "a particular characteristic" of someone or something, "a sign made to show a direction or to signal a place", and surprisingly (in some countries/regions) a payment made as a promise to buy (to prevent the seller changing the price or selling to somebody else).