MOST AUSTERE is a term used to describe something that is very plain, severe, or strict. The crossword solutions for this term are BLEAKEST (8 letters), SEVEREST (8 letters), LEANEST (7 letters), and STERNEST (8 letters). BLEAKEST implies a lack of hope or joy, while SEVEREST suggests a harshness or rigidity. LEANEST implies a lack of excess or luxury, and STERNEST implies a firmness or severity. All of these words together suggest a lack of comfort or indulgence, making MOST AUSTERE an apt description.