Used of the degree of something undesirable e.g. pain or weather.

synonyms: badness, severity.

Dutch: ernst, strengheid
Polish: dotkliwość

Something hard to endure.

synonyms: asperity, grimness, hardship, rigor, rigorousness, rigour, rigourousness, severity.

Dutch: ondraaglijkheid, ruwheid, ellende, ontbering, ontberingen

Extreme plainness.

synonyms: austereness, severity.

Polish: surowość

Excessive sternness.

synonyms: hardness, harshness, inclemency, rigor, rigorousness, rigour, rigourousness, severity, stiffness.

Dutch: gestrengheid, strengheid
Polish: surowość, srogość