This is the 8593rd most frequent Catalan word.
embrutar
To make dirty.
The verb "embrutar" is used literally to mean to make something dirty or to soil it.
La pluja va embrutar els vidres de les finestres.
The rain dirtied the window panes.
Here, "embrutar" is used figuratively to mean to harm or soil someone's reputation.
No vulguis embrutar la reputació dels altres amb mentides.
Do not try to tarnish the reputation of others with lies.
This sentence uses "embrutar" to describe getting one's hands dirty from physical work, illustrating a practical context.