frotar
= rub, massage, rub together.
Ex: Finally, test the coating of a glossy paper by rubbing it with a piece of silver.
Ex: "Since we"re on the topic," he sighed, massaging his temples, "let me share a few other thoughts with you".
Ex: After wetting the hands with clean, warm water, applying soap, and working up a lather, the hands should be rubbed together for at least 20 seconds.
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* frotar con un cepillo = brush.
* frotar hasta hacer espuma = lather.
* quitar frotando = rub off, rub.
* untar frotando = rub.