Select the most appropriate meaning of the given idiom.

A snake in the grass

A hidden enemy

The most appropriate meaning of the idiom "a snake in the grass" is a hidden enemy.

This idiom is used to describe someone who is pretending to be friendly or helpful, but who is actually plotting to harm someone. It is often used to warn people to be careful of people who they do not know well.

For example, you might say that your new coworker is a snake in the grass if you think that they are trying to sabotage your work. Or, you might say that your new friend is a snake in the grass if you think that they are trying to steal your boyfriend or girlfriend.

The other options are not as accurate.

• A sudden death - This option is not accurate because the idiom does not have anything to do with death.
• A good fortune - This option is not accurate because the idiom does not have anything to do with good luck.
• An unfortunate accident - This option is not accurate because the idiom does not have anything to do with accidents.