Which of the following has a prefix that means 'not' or opposite of?

1. Understand
2. Until
3. Underling
4. Unfortunately
5. Unlike

There are two.

In your mind, replace "Un" on each word with "not" and let me know which two make sense.

Unlike

Unfortunately

To find the answer to this question, we need to understand what a prefix is and what it means.

A prefix is a word part that is added to the beginning of a word to change its meaning. In this case, we are looking for a prefix that means "not" or "opposite of."

Let's examine each option:

1. Understand does not have a prefix that means "not" or "opposite of." The prefix "under-" in understand means "below" or "beneath."

2. Until also does not have a prefix that means "not" or "opposite of." It does not have a prefix at all.

3. Underling has the prefix "under-," but it does not mean "not" or "opposite of." The prefix "under-" in underling means "below" or "beneath."

4. Unfortunately has the prefix "un-," which means "not" or "opposite of." Therefore, this word matches the description. The prefix "un-" in unfortunately changes the meaning of the word to "not fortunate" or "not luck."

5. Unlike has the prefix "un-," which means "not" or "opposite of." Therefore, this word also matches the description. The prefix "un-" in unlike changes the meaning of the word to "not like" or "different from."

Based on the analysis, the words that have a prefix that means "not" or "opposite of" are unfortunately and unlike.