The quality or state of being austere; the condition of being severe, strict, and without luxuries.
From austere plus the suffix -ness, which converts adjectives into abstract nouns. Austere comes from Latin austerus, originally meaning sour or harsh.
Abstract nouns ending in -ness are among English's most reliable word-building tools—you can stack it onto almost any adjective. 'Austereness' captures not just one stern moment, but the whole lifestyle or philosophy of deliberately avoiding comfort.
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