Which of the following is a correctly written compound word?

1) Thirty one
2) Self-evident
3) Quickly-running
4) Spur of the moment-decision

It would be great if you could provide me with a answer and explanation. Thank You

# 2 is correctly written. Check this site for hyphenation rules.

http://owl.english.purdue.edu/handouts/grammar/g_hyphen.html

Thanks for the website info!!

The correct option from the list is 2) Self-evident.

Compound words are formed by combining two or more words to create a new word with a different meaning. In this case, "self" and "evident" are combined to form the compound word "self-evident," which means something that is clearly true without needing any further explanation.

To determine if a word is a compound word, you can break it down into its individual parts and see if each part can stand alone as a separate word with its own meaning. In this case, both "self" and "evident" can be recognized as individual words.

Let's analyze the other options:

1) Thirty one: This is not a compound word because "thirty" and "one" are separate words that are not combined to create a new meaning. They are used to represent the number 31.

3) Quickly-running: This is not a compound word because it does not follow the typical pattern of joining two words together. The words "quickly" and "running" are actually an adverb and a verb, respectively, which are used together to describe how someone is running, but they are not combined to form a new word.

4) Spur of the moment-decision: This is not a compound word because it is a phrase made up of multiple words. While it is a common expression, it is not considered a compound word.

Therefore, the correct option is 2) Self-evident, as it meets the criteria of a compound word by combining two separate words to create a new meaning.