IPA: /ɔːˈstɜːrnəs/
KK: /ɔːˈstɜrnəs/
The quality of being strict, severe, or simple in appearance or behavior.
The austereness of the monastery was evident in its plain architecture and lack of decoration.
Austereness → It is formed from "austere" (from Latin *austerus*, meaning severe or strict) and the suffix "-ness" (meaning the state or quality of). The word "austereness" refers to the quality of being severe or strict in manner or appearance.
Think of the word 'austere' which means severe or strict, and remember that 'austereness' describes the state of being severe.