If we are going to search the meaning of the word "austere" in the dictionary or any reliable sources, we will see that this means severe or strict in manner or unemotional, etc. From the words used in the sentence, another word that has similar meaning to the word "austere" is the word "stern". Thus, the answer to this item is stern.
It is I have come.
present simple I / you / we / they come
he / she / it comes
past simple came
past participle come
-ing form coming
The russian revolution was indeed a failure
The puppy, who's name is fluffy, ran across the field.