engrasan
-they grease
The word engrasan is the present form of engrasar in the third person plural.
See the full engrasar conjugation

engrasar

Los instrumentos derivados son los nuevos lubricantes que engrasan las ruedas de la maquinaria en el mercado de los especuladores.
The derivatives are the new lubricant greasing the wheels of the machinery in the speculators’ market.
En mi opinión, esta es una crisis económica, aunque las finanzas, que normalmente engrasan las ruedas de la economía, se encuentran en el ojo del huracán.
In my view, this is an economic crisis, while finance, which normally greases the wheels of the economy, is truly in the grip of a typhoon.
Al mismo tiempo se promueven políticas que supuestamente engrasan las ruedas de la inmigración.
At the same time, policies are being promoted which allegedly oil the wheels of immigration.
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