rastro1

¹ = trace.

Ex. But there was no trace of sinisterness in Balzac's manner.

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* dejar rastro = leave + a trace.

* desaparecer sin dejar rastro = evaporate into + thin air, vanish into + thin air, disappear into + thin air, disappear without + a trace, disappear into + the blue, vanish into + the blue.

* sin dejar rastro = into thin air.