Verb

grassieren

to be rampant, to spread, to rage

Eine Grippewelle grassiert im Land.

A flu epidemic is rampant in the country.

Das Gerücht grassiert in der ganzen Stadt.

The rumour is spreading throughout the city.

((intransitive)) to be rampant (of a disease, rumour) A flu is rampant. (Eine Grippe grassiert.)

Synonyms: sich ausbreiten, wüten, umgehen

From French 'grasser' (to grow fat), from Latin 'crassus' (fat, thick). The sense shifted to 'spread destructively'.

Imagine 'grass' spreading rapidly and uncontrollably across a field.

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