crasse
filth, grime
noun KRAHSS Rare
Origin: Latin crassus (thick, coarse)
Usage Note
Crasse refers to ingrained dirt or grime, often with a sense of moral squalor. The adjective crasseux / crasseuse means 'filthy'. In figurative use, une ignorance crasse means abysmal ignorance, and faire une crasse à quelqu'un means to play a dirty trick on someone.
Examples
"Les murs de la cave étaient couverts de crasse."
Natural Translation
The cellar walls were covered in grime.
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