Select the option that can be used as a one-word substitute for the given group of words.

Lasting for a very short period of time

Ephemeral

The word that can be used as a one-word substitute for "lasting for a very short period of time" is ephemeral.

• Permanent means lasting or existing for a very long time.
• Ceaseless means never stopping or ceasing.
• Pungent means having a strong, sharp smell or taste.
• Ephemeral means lasting for a very short time.

Ephemeral is the most appropriate word for this group of words because it specifically refers to something that does not last very long. The other words do not have the same connotation of short-livedness.