Question

make a word that means \to do less than what is expected.\ under non achieve mis

Explanation:

To form a word meaning "to do less than what is expected", we analyze the prefixes and the root word "achieve". The prefix "under - " means "less than" or "below", so combining "under" with "achieve" gives "underachieve", which fits the meaning. "Non - " would imply "not" in a different context (e.g., non - achieve is not a standard word with the intended meaning), and "mis - " implies doing something wrong or incorrectly (e.g., misachieve is not the right term for doing less than expected).

Answer:

underachieve (formed by combining the prefix "under" with "achieve")